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