Love a duck! (3)
I believe the answer is:
nil
I believe this clue is a double definition.
'love' is the first definition.
(love and nil mean zero in cricket and football)
'a duck' is the second definition.
(both can mean zero)
(Other definitions for nil that I've seen before include "Zero, zilch" , "none" , "Don't despair - . . . desperandum" , "0" , "duck" .)