First-class male in torn clothing (7)
I believe the answer is:
raiment
'clothing' is the definition.
(raiment is a kind of clothing)
'first-class male in torn' is the wordplay.
'first class' becomes 'ai' (A1 - top quality).
'male' becomes 'm' (common abbreviation).
'in' means one lot of letters goes inside another.
'torn' becomes 'rent' (rending is a kind of tearing).
'ai'+'m'='aim'
'aim' inserted inside 'rent' is 'RAIMENT'.
(Other definitions for raiment that I've seen before include "Minaret (anag) - clothing" , "Poetic word for clothing" , "Especially fine or decorative clothing" , "Clobber" , "these garments are old-fashioned" .)