Bad stain in cloth (5)
I believe the answer is:
satin
'cloth' is the definition.
(satin is a kind of cloth)
'bad stain' is the wordplay.
'bad' indicates anagramming the letters.
'stain' is an anagram of 'SATIN'.
'in' acts as a link.
(Other definitions for satin that I've seen before include "Smooth glossy fabric" , "Silk fabric" , "Stain on shiny cloth" , "Rich cloth" , "Smooth and silky" .)