Get level out of revenge (4)

I believe the answer is:

even

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'get level out' is the definition.
I can't tell whether this definition defines the answer.

'of revenge' is the wordplay.
'of' says the answer is hidden in the clue.
'EVEN' is hidden within 'revenge'.

Can you help me to learn more?

(Other definitions for even that I've seen before include "neck and neck" , "Flat, regular" , "Not odd; flat" , "end of the day, reading poetry" , "happening to take time off?" .)

I've seen this clue in The Mirror and The Daily Express.

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