Dramatic scene in which gold is hidden under item of furniture (7)
I believe the answer is:
tableau
'dramatic scene' is the definition.
(I've seen this before)
'gold is hidden under item of furniture' is the wordplay.
'gold' becomes 'au' ('Au' can be a synonym of 'gold').
'is hidden under' means one lot of letters go next to another.
'item of furniture' becomes 'table' (I've seen this before).
'au' after 'table' is 'TABLEAU'.
'in which' acts as a link.
(Other definitions for tableau that I've seen before include "- - vivant" , "Scene, representation" , "still life?" , "dramatic picture" , "Group of motionless figures -- dramatic scene" .)