Spied winding cord - that's hateful (10)
I believe the answer is:
despicable
'hateful' is the definition.
(thesaurus)
'spied winding cord' is the wordplay.
'winding' is an anagram indicator.
'cord' becomes 'cable' (cable is a kind of cord).
'spied' is an anagram of 'despi'.
'despi'+'cable'='DESPICABLE'
'that's' acts as a link.
(Other definitions for despicable that I've seen before include "bum" , "Mean" , "Vile" , "rotten" .)