1cue 
/ˈkju:/ noun
plural cues /ˈkju:/ noun [count] 1 : a word, phrase, or action in a play, movie, etc., that is a signal for a performer to say or do something
▪ That last line is your cue to exit the stage. 2 : a sign that tells a person to do something
▪ I'll take that yawn as my cue to leave. ▪ Their silence was a cue for him to speak. 3 : something that indicates the nature of what you are seeing, hearing, etc.
▪ The expressions on people's faces give us visual cues about their feelings. ▪ auditory cues
▪ That last line is your cue to exit the stage.
▪ I'll take that yawn as my cue to leave. ▪ Their silence was a cue for him to speak.
▪ The expressions on people's faces give us visual cues about their feelings. ▪ auditory cues
on cue
◊When something happens (right) on cue or as if on cue, it happens at the exact moment you would expect it to.
▪ She arrived right on cue at the mention of her name. ▪ As if on cue, the entire group burst into laughter.
▪ She arrived right on cue at the mention of her name. ▪ As if on cue, the entire group burst into laughter.
take a/your cue from
: to do what is done or suggested by (someone or something)
▪ Take a cue from the experts and get your taxes done early this year. ▪ We should take our cue from their example.
▪ Take a cue from the experts and get your taxes done early this year. ▪ We should take our cue from their example.
— compare 3cue
