Gymnastic apparatus (8,4)
I believe the answer is:
parallel bars
'gymnastic apparatus' is the definition.
(parallel bars is a kind of gymnastic apparatus)
This is the entire clue.
(Other definitions for parallel bars that I've seen before include "Facility at gym club" , "Gymnastic event and apparatus" , "may enable people to drink separately?" , "Gymnast's supports" , "Gymnastic discipline" .)