Unwieldy boat (3)
I believe the answer is:
tub
'unwieldy boat' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tub that I've seen before include "An informal bath or boat" , "'Broad, open vessel (3)'" , "Maybe it sailed" , "Bath; food container" , "Barrel; boat" .)