Cribbage piece (3)
I believe the answer is:
peg
'cribbage piece' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for peg that I've seen before include "Old song: ''... o' my heart''" , "Clip for hanging washing" , "The girl to hold a hat" , "Kind of clip for fastening clothes to line" , "Limit" .)