noun

a thing said or done that serves as a signal to an actor or other performer to enter or to begin their speech or performance.

she had not yet been given her cue to come out on to the dais

signal,sign,indication,prompt,reminder,prompting,nod,word,hint,suggestion,intimation,high sign,zeitgeber

verb

give a cue to or for.

Ros and Guil, cued by Hamlet, also bow deeply