Definition of "Cue" :

noun: sports implement consisting of a tapering rod used to strike a cue ball in pool or billiards

noun: a stimulus that provides information about what to do

noun: evidence that helps to solve a problem

noun: an actor's line that immediately precedes and serves as a reminder for some action or speech

verb: assist (somebody acting or reciting) by suggesting the next words of something forgotten or imperfectly learned