Answer:

SIGNAL

AnswerCrossword Clue
SIGNALGesture
SIGNALCue
SIGNALSmoke ....
SIGNALTower blinker
SIGNALRadar blip, e.g.
SIGNALAll clear, e.g.
SIGNALCell user's need
SIGNALBird call, maybe
SIGNALIndicate a turn
SIGNALA wink or a nod, maybe
SIGNALIndicate
SIGNALCatcher's finger-waggling
SIGNALUse a blinker
SIGNALHerald
SIGNALUse a semaphore
SIGNALFlare, usually
SIGNALTraffic light, for example
SIGNALRed light, e.g.
SIGNALLight at a corner
SIGNALFlag or flare
SIGNALFlag or flare, perhaps
SIGNALNod or wink
SIGNALWarning gesture
SIGNALFlare, e.g.
SIGNALPrepare to change lanes
SIGNALTaps, e.g.
SIGNALNoticeable.
SIGNALRemarkable.
SIGNALTraffic light.
SIGNALConspicuous.
SIGNALFlare.
SIGNALSemaphore.
SIGNALDistinctive.
SIGNALGive the high sign
SIGNALBridge high-low play
SIGNALOutstanding
SIGNALHigh-low play in bridge
SIGNALDistinctive
SIGNALArmy's ... Corps
SIGNALHigh-low play at bridge