Vessel used by stunt men (3)
I believe the answer is:
tun
'vessel' is the definition.
(I know that tun is a type of barrel)
'used by stunt men' is the wordplay.
'used by' says the answer is hidden in the clue.
'TUN' is hidden within 'stunt men'.
(Other definitions for tun that I've seen before include "'Large cask, for beer perhaps (3)'" , "butt" , "Quite enough wine" , "Large cask for wine or beer" , "Large cask or barrel" .)