Crossword Genius

Action working both ways (4)

Ross

I believe the answer is:

deed

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'both ways' is the definition.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for deed that I've seen before include "Document showing ownership" , "Legal document for transfer of property" , "Action - legal document" , "Act - exploit - legal document" , "Feat" .)

I've seen this clue in The Mirror.
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