Bared yet treacherously revealed (8)

I believe the answer is:

betrayed

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

'revealed' is the definition.
(betraying is a kind of revealing)

'bared yet treacherously' is the wordplay.
'bared yet' anagrams to 'BETRAYED'.
But, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for betrayed that I've seen before include "Gave away" , "sold down the river" , "Handed over or exposed a friend to an enemy" , "Broke one's promise" , "Was disloyal to (someone)" .)

I've seen this clue in The Globe and Mail.

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