See love in lover (5)
I believe the answer is:
romeo
'lover' is the definition.
(I've seen this in another clue)
'see love' is the wordplay.
'see' becomes 'rome' (the Holy See or See of Rome is home to the pope).
'love' becomes 'o' (love means zero in tennis).
'rome'+'o'='ROMEO'
'in' is the link.
(Other definitions for romeo that I've seen before include "Don Juan" , "Shakespearean character" , "Shakespearean hero" , "A loving character" , "Amorous male" .)