Rolled gold on a boat (7)
I believe the answer is:
gondola
'boat' is the definition.
(I know that gondola is a type of boat)
'rolled gold on a' is the wordplay.
'rolled' is an anagram indicator.
'gold'+'on'='goldon'
'goldon' is an anagram of 'gondol'.
'gondol'+'a'='GONDOLA'
(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" .)