Cash the teller didn't receive? (4,5)
I believe the answer is:
hush money
'cash' is the definition.
The definition and answer can be both related to property as well as being singular nouns.
Maybe they are linked in a way I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for hush money that I've seen before include "Payment to keep another silent" , "sweetener" , "Price of silence" , "Payment to ensure silence" .)