Garden bird (5)
(Other definitions for sparrow that I've seen before include "A chirrupy city bird" , "Cock Robin's killer" , "Little brown bird" , "Small songbird" , "House bird" .)
'garden bird' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for robin that I've seen before include "Small brown and red bird" , "Batman's helper" , "flier" , "Bird; man's name" , "Batman's assistant" .)
(Other definitions for finch that I've seen before include "Peter - - , film actor; bird" , "Singer" , "Type of bird" , "Seed-eating songbird" , "Bird such as canary" .)
(Other definitions for great tit that I've seen before include "Bird changed" , "Common small bird with yellow breast" , "Small songbird" , "A bird; target it (anag)" , "Black-headed bird" .)