Spotty cloth Deb designed (8)
I believe the answer is:
blotched
'spotty' is the definition.
(thesaurus)
'cloth deb designed' is the wordplay.
'designed' indicates an anagram (designed with the letters).
'cloth'+'deb'='clothdeb'
'clothdeb' anagrammed gives 'BLOTCHED'.
(Other definitions for blotched that I've seen before include "with unsightly marks" , "marked" , "Stained" .)