Golden pepper shortly providing yellow pigment (8)
I believe the answer is:
orpiment
'yellow pigment' is the definition.
(orpiment is a yellow pigment)
'golden pepper shortly' is the wordplay.
'golden' becomes 'or' ('or' is the name for gold in heraldry).
'pepper' becomes 'pimento' (pimiento is a type of pepper).
'shortly' means to remove the last letter.
'pimento' with its final letter taken off is 'piment'.
'or'+'piment'='ORPIMENT'
'providing' is the link.
(Other definitions for orpiment that I've seen before include "Source of arsenic" , "yellow ore" .)