Wrestling for love as well as money (4)
I believe the answer is:
sumo
'wrestling' is the definition.
(I know that sumo is a type of wrestling)
'love as well as money' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'as well as' says to put letters next to each other.
'money' becomes 'sum' (I've seen this before).
'o' after 'sum' is 'SUMO'.
'for' is the link.
(Other definitions for sumo that I've seen before include "Traditional Japanese wrestling by fat men" , "Grappling" , "Japanese wrestling sport of over-weight men" , "Jap. wrestling" , "slappers fighting?" .)