He makes capital love (5)
I believe the answer is:
romeo
'he' is the definition.
'capital love' is the wordplay.
'capital' becomes 'rome' (capital of Italy).
'love' becomes 'o' (love means zero in tennis).
'rome'+'o'='ROMEO'
'makes' is the link.
(Other definitions for romeo that I've seen before include "Shakespearean hero" , "Code word for the letter R" , "Amorous male" , "Ladies' man" , "He loved" .)