Banker's paintings discovered (4)
I believe the answer is:
ural
'banker's' is the definition.
Both the answer and definition are singular nouns.
Perhaps you can see a link between them that I can't see?
'paintings discovered' is the wordplay.
'paintings' becomes 'murals' (mural is a kind of painting).
'discovered' means to look at the middle letters (dis-covered - outer letters removed).
The centre of 'murals' is 'URAL'.
Can you help me to learn more?
(Other definitions for ural that I've seen before include "Russian river, rising in the mountains between Europe and Asia" , "Europe/Asia river" , "Russian river giving name to mountains" , "River of central Russia" , "Runner" .)