Gold thus put in container by islander (8)
I believe the answer is:
corsican
'islander' is the definition.
(I've seen this before)
'gold thus put in container' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'thus' becomes 'sic' (synonyms).
'put in' is an insertion indicator.
'container' becomes 'can' (can is a kind of container).
'or'+'sic'='orsic'
'orsic' going into 'can' is 'CORSICAN'.
'by' is the link.
(Other definitions for corsican that I've seen before include "Mediterranean island native" , "Islander such as Napoleon" , "Nationality of citizen of Ajaccio, birthplace of Napoleon" , "Island nationality of citizen of Ajaccio, say Napoleon" , "Napoleon, perhaps?" .)