The crossword solution for the term 'HOLDING UP THE LINE FOR?' is 'CUING'. Cuing is a job that involves providing cues to actors or performers during a show or production. It is the responsibility of the cuer to ensure that the performers are on cue and that the show runs smoothly. The cuer is also responsible for keeping track of the timing of the show and making sure that all cues are given in a timely manner.