For sale – new footwear (7)
I believe the answer is:
loafers
'footwear' is the definition.
(I've seen this before)
'for sale new' is the wordplay.
'new' is an anagram indicator.
'for'+'sale'='forsale'
'forsale' anagrammed gives 'LOAFERS'.
(Other definitions for loafers that I've seen before include "They add cargo" , "Casual shoes" , "Casual footwear" , "couch potatoes" , "Comfortable shoes" .)