Cash the teller didn't receive? (4,5)

I believe the answer is:

hush money

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'cash' is the definition.
The definition and answer can be both related to property as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I don't understand the rest of the clue.

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(Other definitions for hush money that I've seen before include "Payment to keep another silent" , "sweetener" , "Price of silence" , "Payment to ensure silence" .)

I've seen this clue in the Evening Standard.

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