Answer: turnsignal

AnswerCrossword Clue
TURNSIGNALAid in traffic flow
TURNSIGNALBlinker
TURNSIGNALAuto blinker
TURNSIGNALAutomobile feature
TURNSIGNALSmell of sour milk?
TURNSIGNALFlashing light
TURNSIGNALIt creates a flashing light
TURNSIGNALCourse-changing light
TURNSIGNALIt involves a flashing light