Cotton or rayon (6)
I believe the answer is:
fabric
This clue is a double definition.
'cotton' is the first definition.
(thesaurus)
'rayon' is the second definition.
(thesaurus)
(Other definitions for fabric that I've seen before include "Manufactured cloth" , "Woven or knitted material" , "Woven textile" , "(Texture of) cloth" , "Material in general" .)