Try an old broken boat (7)
I believe the answer is:
Here is my best explanation:
'boat' is the definition.
(I've seen this before)
'try an old broken' is the wordplay.
'try' becomes 'go' (go is a kind of try).
'broken' is an anagram indicator.
'anold' with letters rearranged gives 'ndola'.
(Other definitions for gondola that I've seen before include "Compartment suspended from an airship", "Supermarket display unit", "mountain climber", "Venetian transport", "narrow boat", "Venetian boat - airship cabin", "It's traditionally used on the canals of Venice", "Palmieris' craft", "Venetian vessel" and "Venetian craft".)