Venetian taxi (7)
I believe the answer is:
gondola
'venetian taxi' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for gondola that I've seen before include "Traditional boat of Venice" , "Boats on the canals of Venice" , "Boat on Venetian canals" , "It's traditionally used on the canals of Venice" , "Venetian transport" .)