Told 'intrudes into' means 'spoils' (5,5)

I believe the answer is:

prize money

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'spoils' is the definition.
The definition and answer can be both related to property as well as being singular nouns.
Maybe there's an association between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for prize money that I've seen before include "Pot" , "ready for victory?" .)

I've seen this clue in The Telegraph.

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