Sign language is pretty handy, e.g.
Sign language pioneer Abbé de l'___
Sign language used at racecourses by bookmakers
Sign language with hands used by deaf and dumb people
Sign language?
sign Lavatory London
Sign letters on the cross
Sign light
Sign lights
Sign like "5 MPH"
Sign like "Give 'em a brake"
Sign made with two digits
Sign made with two fingers
Sign maker's aid
Sign maker's pattern
Sign makers in "Signs"
Sign material, sometimes
Sign me up!
Sign meaning "Let this be our little secret"
Sign message often seen on TV
Sign near a Crowd
Sign near a freeway entrance
Sign near a highway entrance
Sign near a restricted area
Sign near a stairway
Sign near roadwork, maybe
Sign needing interpreting
Sign next to free samples
Sign next to Virgo
Sign not always recognized
Sign not to play
sign number Bank
Sign of a B'way hit
Sign of a B'way success
Sign of a bad apple
Sign of a bad waiter
Sign of a barbecuer's inattention?
Sign of a beaver's activity, maybe
Sign of a big crowd
Sign of a big hit
Sign of a big-time beer drinker
Sign of a boffo show
Sign of a brake problem
Sign of a Broadway hit
Sign of a Broadway smash
Sign of a bureaucracy
Sign of a canine excitement
Sign of a cat burglar?
Sign of a champ
Sign of a changed sheet
Sign of a changed test answer
Sign of a clean apartment?
Sign of a close shave?
Sign of a clunker
Sign of a coming event
Sign of a contented cat
Sign of a correction
Sign of a crowd
Sign of a deficit
Sign of a dying fire
Sign of a faulty washer
Sign of a fender bender
Sign of a fight?
Sign of a fire
Sign of a fish on the line
Sign of a flu onset
Sign of a full house
Sign of a gas leak
Sign of a good reception
Sign of a good show
Sign of a good turnout: Abbr.
Sign of a goof
Sign of a happy hound
Sign of a happy pup
Sign of a healed 10-Across
Sign of a hit
Sign of a hit show
Sign of a hit, briefly
Sign of a leader, it is said
Sign of a leak
Sign of a lurking shark
sign of a mathematical operation
Sign of a mistake
Sign of a musical break
Sign of a narrowing path
Sign of a natural gas leak
Sign of a natural leader?
Sign of a packed house
Sign of a page-turner?
Sign of a past injury
Sign of a pause
Sign of a pen problem?
Sign of a play's success
Sign of a Realtor's success?
Sign of a recent bite
Sign of a saint
Sign of a sale
Sign of a sale in some stores
Sign of a seating shortage
Sign of a sell-out
Sign of a sellout
Sign of a sellout show
Sign of a sellout, briefly
Sign of a sellout, for short
Sign of a sellout?
Sign of a sensation
Sign of a slip
Sign of a sloop passing through customs?
Sign of a sloppy breakfast eater?
Sign of a slow leak
Sign of a smash
Sign of a smash hit
Sign of a smash hit, briefly
Sign of a smash: Abbr.
Sign of a sold out attraction
Sign of a sore throat
Sign of a sort
Sign of a Southerner, perhaps
Sign of a spill
Sign of a sprained ankle
Sign of a stage hit
Sign of a struggle
Sign of a success
Sign of a successful show
Sign of a sunbather
Sign of a theater hit
Sign of a theatrical hit
Sign of a theatrical success
Sign of a thick brogue?
Sign of a well-worn trail
Sign of a Winner
Sign of a wound's healing
Sign of acne
Sign of adulthood
SIGN of affection
Sign of age on a car
Sign of age, maybe
Sign of age?
Sign of aging
Sign of agitation at the beach
Sign of agreement
Sign of amusement
Sign of an absent mind
Sign of an allergic reaction
Sign of an allergy
Sign of an earthquake
Sign of an engine problem
Sign of an error
Sign of an escape, perhaps
Sign of an escape?
Sign of an impending merger?
Sign of an impending storm
Sign of an indifferent homemaker
Sign of an old bumper
Sign of an old injury
Sign of an old wound
Sign of an omission
Sign of an overflow
Sign of an uncleaned fridge
Sign of an untreated pool
Sign of anxiety
Sign of apathy
Sign of appreciation
Sign of Approval
sign of approval
Sign of April Fool's Day?
Sign of Aries
Sign of assent
Sign of audience approval
Sign of August
Sign of authority
Sign of auto body aging
Sign of autumn
Sign of availability
Sign of bad food, perhaps
Sign of bad radio reception
Sign of bad reception
Sign of bad service?
Sign of bad weather
Sign of balance
Sign of being full?
Sign of being packed?
Sign of being unable to sit down
Sign of biodegradation
sign of boiling water
Sign of boredom
Sign of Broadway success
Sign of burnout hidden in eight puzzle answers
Sign of Capricorn
Sign of cat love
Sign of caution
Sign of change
sign of chinese zodiac
Sign of clearing
Sign of cold feet?
Sign of cold weather
Sign of coming danger, to some
Sign of conceit
Sign of condensation
Sign of confusion
Sign of contempt
Sign of cooking
Sign of correction
Sign of corrosion
Sign of crying
Sign of culture
Sign of cyberhumor
Sign of damage
Sign of dampness
Sign of danger
Sign of decay
Sign of deceit, and a hint to this puzzle's circled letters
Sign of deceit, and a phonetic hint to four puzzle answers
Sign of decomposition
Sign of dermatitis
Sign of desperation
Sign of destitution
Sign of deterioration
Sign of disapproval
Sign of disgrace
Sign of displeasure
Sign of disrespect
Sign of dissent
Sign of distress
Sign of distress, perhaps
Sign of disuse
Sign of Disuse Fall into
Sign of doom
Sign of drainage
Sign of early August
Sign of eccentricity?
Sign of economic upswing
Sign of elimination
Sign of embarrassment?
Sign of emptiness
Sign of engine trouble
Sign of engine trouble, maybe
Sign of engine trouble, perhaps
Sign of error
Sign of fall
Sign of fallibility
Sign of fatigue
Sign of fear
Sign of feline felicity
Sign of fire
Sign of fish
Sign of fish gone bad
Sign of foreboding
Sign of forgetfulness
Sign of freezing weather?