Answer: clapping

AnswerCrossword Clue
clappingStrike the palms of (one's hands) together once, esp. as a signal
clappingCLAP, the noise of striking two things together
clappingShow approval of (a person or action) in this way
clappingSlap (someone) encouragingly on the back or shoulder
clappingStrike the palms of (one's hands) together repeatedly, typically in order to applaud
clapping(of a bird) Flap (its wings) audibly
clappingPlace (a hand) briefly against or over one's mouth or forehead as a gesture of dismay or regret