Crossword Genius

Feat unaffected by revolution (4)

Ross

I believe the answer is:

deed

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'feat' is the definition.
(synonyms)

I don't understand the rest of the clue.

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(Other definitions for deed that I've seen before include "Legal document for transfer of property" , "A conscious action" , "Action - legal document" , "documentary evidence" , "Conscious act" .)

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