Sticker on wrong bat (3)
I believe the answer is:
tab
'sticker' is the definition.
(small piece of paper for identification)
'wrong bat' is the wordplay.
'wrong' indicates an anagram.
'bat' is an anagram of 'TAB'.
'on' is the link.
(Other definitions for tab that I've seen before include "Till bill" , "Tally at bar (colloq.)" , "Kind of label for bat" , "The bill in a restaurant" , "ticket" .)