Man buries broken underwater vessel (9)
I believe the answer is:
submarine
'underwater vessel' is the definition.
(I've seen this before)
'man buries broken' is the wordplay.
'broken' indicates an anagram.
'man'+'buries'='manburies'
'manburies' with letters rearranged gives 'SUBMARINE'.
(Other definitions for submarine that I've seen before include "Submersible warship" , "Captain Nemo's Nautilus" , "Underwater (vessel)" , "Under the surface" , "U-boat" .)