Nothing but love (3)
I believe the answer is:
nil
I believe this clue is a double definition.
'nothing' is the first definition.
(eg nil is zero in football)
'love' is the second definition.
(love and nil mean zero in cricket and football)
'but' acts as a link.
(Other definitions for nil that I've seen before include "Nothing, no value" , "Nothing - in Latin" , "Lacking value" , "Love" , "Non-existent" .)