Rolled gold on a boat (7)
I believe the answer is:
'boat' is the definition.
(I know that gondola is a type of boat)
'rolled gold on a' is the wordplay.
'rolled' indicates an anagram.
'goldon' is an anagram of 'gondol'.
(Other definitions for gondola that I've seen before include "Venetian boat - airship cabin" , "Venetian transport" , "Goon lad (anag.)" , "Cabin suspended from an airship" , "Venetian canal boat" .)