Set unit

REP

Think of a short term used in exercise routines or theater rehearsals to describe a single complete cycle.

"Set" can mean a group of exercises in a workout, and a "unit" of those is often called a "rep" (short for repetition). The clue plays on the double meaning of "set"—both as a collection and as a fixed number of exercises—while "unit" hints at a single instance. It’s a straightforward definition with a fitness context, where "rep" is the natural answer.