Bloomers made by singer joining football team (9)
I believe the answer is:
larkspurs
'bloomers' is the definition.
(type of flowering plant)
'singer joining football team' is the wordplay.
'singer' becomes 'lark' (lark is a kind of birdanimal).
'joining' means one lot of letters go next to another.
'football team' becomes 'Spurs' (Tottenham Hotspur FC).
'lark'+'spurs'='LARKSPURS'
'made by' acts as a link.
(Other definitions for larkspurs that I've seen before include "Common names for delphiniums" , "bloomers" .)