Transport gold on a boat (7)
I believe the answer is:
gondola
'boat' is the definition.
(I know that gondola is a type of boat)
'transport gold on a' is the wordplay.
'transport' indicates an anagram (letters are transported elsewhere).
'gold'+'on'='goldon'
'goldon' anagrammed gives 'gondol'.
'gondol'+'a'='GONDOLA'
(Other definitions for gondola that I've seen before include "Traditionally used on Venetian canals" , "Cabin suspended from an airship" , "Traditional boat of Venice" , "Venetian vessel" , "Venetian canal boat" .)