Canal boat (5)
'canal boat' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for barge that I've seen before include "Move roughly; boat" , "Violently push" , "Long, flat-bottomed boat" , "Shove, lighter" , "River transport" .)
'canal boat' is the definition.
This is the entire clue.
(Other definitions for gondola that I've seen before include "Palmieris' craft" , "Traditionally used on Venetian canals" , "Shop unit" , "Boats on the canals of Venice" , "mountain climber" .)