Parts of a gym set (4)
I believe the answer is:
reps
'parts of a gym set' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for reps that I've seen before include "Agents" , "Travelling salespeople, in short" , "Salesmen, in short" , "Salesman, in short" , "Travelling salesmen" .)