Awful-smelling
I believe the answer is:
fetid
I believe this clue is a double definition.
'awful' is the first definition.
(thesaurus)
'smelling' is the second definition.
(thesaurus)
(Other definitions for fetid that I've seen before include "Having a stale and unpleasant smell" , "Stinking, like animal breath" , "Stinking, rank" , "Malodorous, stinking" , "Noxious" .)