Crossword Genius

Cheat, betray (6-5)

Ross

I think it could be either:

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11

6-5

double-cross

I believe this is a double definition.

'cheat' is the first definition.
(thesaurus)

'betray' is the second definition.
(doubling cross is a kind of betraying)

(Other definitions for double-cross that I've seen before include "Cheat - betray" , "Deceive (an ally, maybe)" , "Deceive supposed ally" , "Sell down the river" , "Betray - XX?" .)

I've seen this clue in The Mirror.
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