Division of a real firm accepting case of evasion over raised tax (7)

I believe the answer is:

centavo

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'division of a real' is the definition.
The definition and answer can be both quantities as well as being singular nouns.
Perhaps you can see a link between them that I don't see?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for centavo that I've seen before include "South American money" , "bit of money" , "money abroad" , "Foreign money" , "Small coin of Mexico, Brazil, etc" .)

I've seen this clue in The Times.

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