Piece of clothing that means a good deal (3)
I believe the answer is:
lot
'a good deal' is the definition.
('lot' can be a synonym of 'good deal')
'piece of clothing that' is the wordplay.
'piece of' indicates a hidden word.
'LOT' is hidden within 'clothing that'.
'means' acts as a link.
(Other definitions for lot that I've seen before include "Auction item, great deal" , "Parcel - collection" , "Great deal; destiny" , "Large amount - parcel of land" , "shower" .)