Capital lover and capital love (5)
I believe the answer is:
romeo
'capital lover' is the definition.
(term for a desirable or 'capital' lover)
'capital love' is the wordplay.
'capital' becomes 'rome' (Rome is an example).
'love' becomes 'o' (In tennis, 'love' means 'zero').
'rome'+'o'='ROMEO'
'and' acts as a link.
(Other definitions for romeo that I've seen before include "A great lover" , "Tragic Shakespeare hero" , "Shakespearean hero" , "Literary lover" , "Lover boy" .)