Reportedly inexperienced novelist (6)
I believe the answer is:
Here is my best explanation:
'novelist' is the definition.
(I've seen this before)
'reportedly inexperienced' is the wordplay.
'reportedly' shows a homophone (sound like).
'inexperienced' becomes 'green' ('green' can be similar in meaning to 'inexperienced').
'green' is a homophone of 'GREENE'.