Bag this accomplice carries (3)
I believe the answer is:
sac
'bag' is the definition.
(a small bag)
'this accomplice carries' is the wordplay.
'carries' says the answer is hidden in the clue.
'SAC' is hidden in the letters of 'this accomplice'.
(Other definitions for sac that I've seen before include "Bag-like cavity" , "Distended membrane; pouch-like cavity" , "Bag, pouch; cyst" , "Traditional entitlement to hold court" , "Pouchlike structure" .)