A vessel to push? (5)

I believe the answer is:

barge

I believe this is a double definition.

'a vessel' is the first definition.
(I know that barge is a type of vessel)

'to push?' is the second definition.
(I've seen this before)

(Other definitions for barge that I've seen before include "Possibly lighter" , "Long boat for freight" , "Canal boat maybe" , "Flat-bottomed cargo boat" , "Violently push" .)

I've seen this clue in the Evening Standard.

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