Accomplished and mature for a boy? (7)
I believe the answer is:
managed
'accomplished' is the definition.
(managing is a kind of accomplishing)
'mature for a boy?' is the wordplay.
'mature' becomes 'aged' (similar in meaning).
'for' says to put letters next to each other (I've seen this in other clues).
'a boy?' becomes 'man' (boy is a kind of man).
'aged' after 'man' is 'MANAGED'.
'and' acts as a link.
(Other definitions for managed that I've seen before include "Coped" , "Ran, administered" , "Controlled, was in charge of" , "Supervised (staff)" , "Contrived" .)