Amateur poet adopting unusual title (10)
I believe the answer is:
dilettante
'amateur' is the definition.
(dilettante is a kind of amateur)
'poet adopting unusual title' is the wordplay.
'poet' becomes 'dante' (I've seen this before).
'adopting' is an insertion indicator.
'unusual' is an anagram indicator.
'title' anagrammed gives 'ilett'.
'dante' enclosing 'ilett' is 'DILETTANTE'.
(Other definitions for dilettante that I've seen before include "Superficial art-lover" , "One dabbling" , "Superficial dabbler in the arts - title at end (anag)" , "amateur artist" , "Amateur art lover" .)