soft, plush fabric (6)
I believe the answer is:
velvet
This clue is a double definition.
'soft' is the first definition.
(similar in meaning)
'plush fabric' is the second definition.
(I've seen this in another clue)
(Other definitions for velvet that I've seen before include "Silky fabric with thick pile" , "Fabric with thick soft pile" , "Plush-like fabric" , "A glove made of this might cover an iron hand" , "Fabric of silk, cotton or nylon" .)