Game of love (6)
I believe the answer is:
tennis
'game of love' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tennis that I've seen before include "Sport with grand slams?" , "Real or lawn game" , "Pete Sampras's sport" , "Game (where love is nought?)" , "Racquet sport" .)