Crossword Genius

What goes around comes around? (8)

Ross

I believe the answer is:

rotation

I'm a little stuck... Click here to teach me more about this clue!

'what goes' is the definition.
I can't tell whether this definition defines the answer.

'around comes around?' is the wordplay.
I cannot really see how this works, but
'around' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
'around?' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for rotation that I've seen before include "Going round" , "Turning movement around an axis" , "Act of turning" , "Revolutionary movement" , "Cycle - revolution" .)

I've seen this clue in the Irish Times.
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