Foul smell (4)
'foul smell' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for stench that I've seen before include "smell, to put it mildly" , "Hum" , "Foul odour" , "Evidence of corruption" , "Strong offensive smell" .)
'foul smell' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for reek that I've seen before include "Whiff" , "Smell foully" , "Smell unpleasant" , "Effluvium" , "Smell badly" .)