Crossword Genius

Passed as symmetrical (3)

Ross

I believe the answer is:

did

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'passed' is the definition.
(doing is a kind of passing)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for did that I've seen before include "Executed!" , "Carried out an act" , "Carried out, performed" , "Acted" , "Accomplished" .)

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