Stinky
I believe the answer is:
fetid
'stinky' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for fetid that I've seen before include "Having a stale and unpleasant smell" , "Stinking, rank" , "Putrid and stinking" , "Evil-smelling, stinking" , "Stinking, perhaps breath" .)