cue

/ˈkyü/

Middle English cu half a farthing (spelled form of q, abbreviation for Latin quadrans quarter of an as)

noun

  1. the letter q

noun

  1. a signal (such as a word, phrase, or bit of stage business) to a performer to begin a specific speech or action

  2. something serving a comparable purpose : hint

  3. a feature indicating the nature of something perceived

That last line is your cue to exit the stage.

I'll take that yawn as my cue to leave.

verb

  1. to give a cue to : prompt

  2. to insert into a continuous performance

cued the band to begin