Gold trade suffering (6)
I believe the answer is:
ordeal
'suffering' is the definition.
(I've seen this before)
'gold trade' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'trade' becomes 'deal' ('deal' can be a synonym of 'trade').
'or'+'deal'='ORDEAL'
(Other definitions for ordeal that I've seen before include "Difficult and testing experience" , "Long painful experience" , "Disturbing experience" , "severe test shows" , "Ancient form of trial" .)