Singer with broken barrel (7)
I believe the answer is:
warbler
'singer' is the definition.
(warbler is a kind of birdanimal)
'with broken barrel' is the wordplay.
'with' becomes 'w' (abbreviation).
'broken' indicates anagramming the letters.
'barrel' is an anagram of 'arbler'.
'w'+'arbler'='WARBLER'
(Other definitions for warbler that I've seen before include "songster" , "A small songbird or similar singer" , "XWD SETTER" , "18's [BIRD]" .)