Gambling counter (4)
I believe the answer is:
chip
'gambling counter' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for chip that I've seen before include "Approach shot at 1 across" , "Piece of potato (on a resentful person's shoulder?)" , "Gambling token" , "Gambling counter; piece of potato" , "Piece of fried potato" .)