Answer: waveoffs

AnswerCrossword Clue
waveoffs(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
waveoffsWAVEOFF, the act of denying landing rights to an aircraft
waveoffsthe postponement of a scheduled landing, as of a space shuttle, due to bad weather anticipated at the landing site