Stink lingers, containing a hint (7)
I believe the answer is:
inkling
'a hint' is the definition.
(I've seen this before)
'stink lingers containing' is the wordplay.
'containing' says the answer is hidden in the clue.
'INKLING' is hidden within 'stink lingers'.
(Other definitions for inkling that I've seen before include "Vague suspicion" , "Conception" , "Vague idea" , "Intimation" , "Faint idea" .)