Total love for wrestling (4)
I believe the answer is:
sumo
'for wrestling' is the definition.
(I've seen this before)
'total love' is the wordplay.
'total' becomes 'sum' (synonyms).
'love' becomes 'o' (love means zero in tennis).
'sum'+'o'='SUMO'
(Other definitions for sumo that I've seen before include "Japanese wrestling for huge men" , "Japanese form of wrestling" , "Style of traditional Japanese wrestling" , "Traditional Japanese wrestling by fat men" , "Japanese wrestling with big fat men" .)