Identifies new stag (4)
I believe the answer is:
tags
'identifies' is the definition.
(I've seen this in another clue)
'new stag' is the wordplay.
'new' indicates anagramming the letters.
'stag' is an anagram of 'TAGS'.
(Other definitions for tags that I've seen before include "trite Latin quotations" , "They are able to identify" , "Labels; quotations" .)