Gold contribution to considerable affluence (4)
I believe the answer is:
leaf
'gold' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'contribution to considerable affluence' is the wordplay.
'contribution to' indicates a hidden word.
'LEAF' is hidden in the letters of 'considerable affluence'.
Can you help me to learn more?
(Other definitions for leaf that I've seen before include "Page of a book" , "Hinged or removable table flap" , "Sheet of written material" , "that's found on plane, for example" , "Turn over a new one to reform" .)