Possibly pines for a bird (5)
I believe the answer is:
snipe
'for a bird' is the definition.
(snipe is a kind of bird)
'possibly pines' is the wordplay.
'possibly' is an anagram indicator.
'pines' anagrammed gives 'SNIPE'.
(Other definitions for snipe that I've seen before include "Verbal criticism" , "Pines for bog bird" , "Curlew or sandpiper" , "Shoot; birds" , "Pines like wading bird" .)