Wrestling for both love and money (4)
I believe the answer is:
sumo
'wrestling' is the definition.
(I know that sumo is a type of wrestling)
'both love and money' is the wordplay.
'both love' becomes 'o' (love means zero in tennis. I am not sure about the 'both' bit.).
'and' means one lot of letters go next to another.
'money' becomes 'sum' (I've seen this in other clues).
'o' put after 'sum' is 'SUMO'.
'for' is the link.
Can you help me to learn more?
(Other definitions for sumo that I've seen before include "Type of Japanese wrestling" , "Large Japanese wrestler" , "Traditional Japanese wrestling by fat men" , "Japanese form of wrestling" , "Style of traditional Japanese wrestling" .)