Check end (4)
I believe the answer is:
stub
'check end' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stub that I've seen before include "Bust (anag.)" , "Pencil or cigarette end" , "Knock (toe); short remnant" , "Residue of cigarette or cheque" , "Blunt end" .)