Banker's paintings discovered (4)
I believe the answer is:
ural
'banker's' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'paintings discovered' is the wordplay.
'paintings' becomes 'murals' (mural is a kind of painting).
'discovered' says to take the centre (dis-covered - outer letters removed).
The middle letters of 'murals' are '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" .)