Amateur kind penning love verse (6)
I believe the answer is:
novice
'amateur' is the definition.
(thesaurus)
'kind penning love verse' is the wordplay.
'kind' becomes 'nice' (I've seen this in another clue).
'penning' indicates putting letters inside.
'love' becomes 'o' (love means zero in tennis).
'verse' becomes 'v'.
'o'+'v'='ov'
'nice' placed around 'ov' is 'NOVICE'.
(Other definitions for novice that I've seen before include "New member (of religious order)" , "A beginner or student nun" , "Beginner as in religious order" , "Probationary nun/monk" , "Convert" .)