Crisp lustrous fabric (7)
I believe the answer is:
taffeta
'crisp lustrous fabric' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for taffeta that I've seen before include "Crisp, smooth, lustrous fabric" , "Fine crisp silk fabric" , "A shiny silklike fabric" , "Stiff shiny material" , "Thin glossy silk fabric" .)