Crossword Genius

Cheats on a concise crossword, swapping words (3,5)

Ross

I believe the answer is:

two times

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'cheats on' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

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(Another definition for two times that I've seen is " Cheats on".)

I've seen this clue in The Independent.
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