Answer: signalling

AnswerCrossword Clue
signallingTransmit information or instructions by means of a gesture, action, or sound
signallingIndicate the existence or occurrence of (something) by actions or sounds
signallingGive an indication of a state of affairs
signalling(of a cyclist, motorist, or vehicle) Indicate an intention to turn in a specified direction using an extended arm or flashing indicator
signallingInstruct (someone) to do something by means of gestures or signs rather than explicit orders
signallingSIGNAL, to notify by means of communication