Seller of very little scrap gold (6)
I believe the answer is:
vendor
'seller' is the definition.
('vendor' can be a synonym of 'seller')
'very little scrap gold' is the wordplay.
'very little' becomes 'v' (abbreviation or little form for 'very').
'scrap' becomes 'end' ('end' can be a synonym of 'scrap').
'gold' becomes 'or' ('or' is the heraldic name for gold).
'v'+'end'+'or'='VENDOR'
'of' is the link.
(Other definitions for vendor that I've seen before include "Salesperson" , "A Latin seller" , "who does business?" , "Person who sells goods" , "One selling house" .)