Bird-talk (4)
I believe the answer is:
chat
I believe this clue is a double definition.
'bird' is the first definition.
(chat is a kind of bird)
'talk' is the second definition.
(thesaurus)
(Other definitions for chat that I've seen before include "Rabbit" , "An inconsequential and informal talk" , "Chew the fat" , "waffle?" , "A bird; converse" .)