Bird — tit (5)
I believe the answer is:
booby
I believe this clue is a double definition.
'bird' is the first definition.
(booby is a kind of bird)
'tit' is the second definition.
(thesaurus)
(Other definitions for booby that I've seen before include "Dunce" , "Pink-footed seabird" , "Stupid person" , "marine bird" , "Gannet" .)