Reversible fabric (6)
I believe the answer is:
damask
'reversible fabric' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for damask that I've seen before include "Silk or linen material woven with pattern on either side" , "Red" , "Rich, heavy fabric with a pattern woven into it, a tablecloth say" , "Patterned material" , "Fabric used for table linen" .)