Intend to appear in torn dress (7)
I believe the answer is:
raiment
'dress' is the definition.
('raiment' can be a synonym of 'dress')
'intend to appear in torn' is the wordplay.
'intend' becomes 'aim' (aiming is a kind of intending).
'to appear in' means one lot of letters goes inside another.
'torn' becomes 'rent' (rending is a kind of tearing).
'aim' put within 'rent' is 'RAIMENT'.
(Other definitions for raiment that I've seen before include "Garb" , "dress?" , "Wear" , "Clobber" , "Garment" .)