Definition of cue up:
(v) :
(idiomatic) To set up people or things so as to be ready for their cues (such as backstage).
(v) :
(transitive) To set up a recording to start at the correct time.
(v) :
(sports, billiards, snooker, pool) To take aim on the cue ball with the cue in a game of snooker, or billiards, etc.
(v) :
Misspelling of queue up. [(British, intransitive) To queue (form a line while waiting).]