Answer: waveoff

AnswerCrossword Clue
WAVEOFFIndicate denial with an arm gesture
WAVEOFFDismiss with one's hand
waveoffthe act of denying landing rights to an aircraft
waveoffthe postponement of a scheduled landing, as of a space shuttle, due to bad weather anticipated at the landing site
waveoff(on an aircraft carrier) the last-minute signaling to an aircraft making its final landing approach that it is not to land on that particular pass but is to go around and come in again