Stunk (6)
I believe the answer is:
reeked
'stunk' is the definition.
('reek' can be a synonym of 'stink')
This is all the clue.
(Other definitions for reeked that I've seen before include "Smelt strongly" , "Smelled strongly as of drink" , "whiffed" , "Smelled of smoke" , "Was foul-smelling" .)