Unfeeling, deadened (4)
I believe the answer is:
numb
This clue is a double definition.
'unfeeling' is the first definition.
(synonyms)
'deadened' is the second definition.
(I've seen this before)
(Other definitions for numb that I've seen before include "Insensitive" , "Lacking feeling" , "Feeling nothing" , "Stinks" , "Deprived of feeling" .)