Gold Conservative figure deposited in bank - he has lots to dispose of (10)
I believe the answer is:
auctioneer
'bank he has lots to dispose of' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'gold conservative figure deposited in' is the wordplay.
'gold' becomes 'Au' (Au is the chemical symbol for gold).
'conservative' becomes 'C' (UK political abbreviation).
'figure' becomes 'one' (a numerical figure).
'deposited' becomes 'tier' (I can't justify this - if you can you should believe this answer much more).
'in' indicates putting letters inside.
'one' put within 'tier' is 'tioneer'.
'au'+'c'+'tioneer'='AUCTIONEER'
Can you help me to learn more?
(Other definitions for auctioneer that I've seen before include "One inviting bids for lots" , "One selling lots" , "one that has lots to offer" .)