A small amount of gold, perhaps (7)
I believe the answer is:
element
I believe this is a double definition.
'a small amount' is the first definition.
(I've seen this before)
'gold perhaps' is the second definition.
(gold is a kind of element)
'of' is the link.
(Other definitions for element that I've seen before include "Fundamental part of whole" , "briefly identified by Al or Mo, among others" , "Wire in electric fire" , "Component - factor" , "Essential factor" .)