A lover of Moore, perhaps (5)
I believe the answer is:
romeo
'a lover' is the definition.
(I know that Romeo is a type of lover)
'moore perhaps' is the wordplay.
'perhaps' indicates anagramming the letters.
'moore' with letters rearranged gives 'ROMEO'.
'of' is the link.
(Other definitions for romeo that I've seen before include "He's a letter read out" , "Don Juan" , "Shakespearean character" , "A great lover" , "Shakespearean hero" .)