Crossword Genius

Decided to keep the police out of the paper (4)

Ross

I believe the answer is:

deed

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'paper' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

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(Other definitions for deed that I've seen before include "Heroic exploit" , "A conscious action" , "Something done" , "Act - exploit - legal document" , "Document showing ownership" .)

I've seen this clue in the Evening Standard.
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