Fabric named for an Asian capital (6)
I believe the answer is:
damask
'fabric named for an asian capital' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for damask that I've seen before include "Patterned cloth" , "Material, originally Syrian" , "heavy embossed table linen" , "Table linen material" , "Lustrous cloth" .)