Rich soft fabric (6)
I believe the answer is:
velvet
'rich soft fabric' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for velvet that I've seen before include "Luxurious fabric; antler covering" , "Fabric with short, soft pile" , "Fabric with thick soft pile" , "Smooth, soft fabric" , "woven fabric" .)