Daisy knocked over football team's comic character (7)
I believe the answer is:
asterix
'comic character' is the definition.
(French comic series)
'daisy knocked over football team's' is the wordplay.
'daisy' becomes 'aster' (I've seen this before).
'knocked over' shows that the letters should be reversed in order.
'football team' becomes 'XI' (a football team, from Roman numerals for 11).
'xi' reversed gives 'ix'.
'aster'+'ix'='ASTERIX'
(Other definitions for asterix that I've seen before include "A Gaul, fought Romans (Goscinny)" , "Gallic hero" , "French cartoon character" , "Cartoon book Gaul" .)