Fight and squabble to get the bird (7)
I believe the answer is:
sparrow
'the bird' is the definition.
(sparrow is a kind of bird)
'fight and squabble' is the wordplay.
'fight' becomes 'spar' (sparring is a kind of fighting).
'and' means one lot of letters go next to another.
'squabble' becomes 'row' (I've seen this in other clues).
'spar'+'row'='SPARROW'
'to get' is the link.
(Other definitions for sparrow that I've seen before include "Cock Robin's killer" , "a British resident" , "Small brownish bird" , "(Formerly very) common British bird" , "Pirate" .)