Fabric displays nasty stain (5)
I believe the answer is:
satin
'fabric' is the definition.
(type of fabric)
'nasty stain' is the wordplay.
'nasty' indicates anagramming the letters (a nasty or wrong spelling).
'stain' with letters rearranged gives 'SATIN'.
'displays' is the link.
(Other definitions for satin that I've seen before include "covered with?" , "Stain on silky cloth" , "Fine material" , "Glossy textile" , "Stain found in cloth" .)