Pick out Art in it, as the boy (7)
I believe the answer is:
patrick
'the boy' is the definition.
'pick out art in it' is the wordplay.
'out' is an anagram indicator.
'in it' means one lot of letters goes inside another.
'art' is an anagram of 'atr'.
'pick' enclosing 'atr' is 'PATRICK'.
'as' acts as a link.
(Other definitions for patrick that I've seen before include "Ireland's patron saint" , "Name" , "Patron saint who said 'Shoo!' to serpents" , "- - Swayze: film actor" , "Patron saint of Ireland" .)