Crossword Genius

To run away is perfectly OK (3,2)

Ross

I believe the answer is:

leg it

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'to run away' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for leg it that I've seen before include "Run away" , "Escape" .)

I've seen this clue in the Evening Standard.
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