Aware of (2,2)

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4 6

2,2

4,2 4* 5*

on to

'aware of' is the definition.
(I've seen this before)

This is all the clue.

(Another definition for on to that I've seen is " Aware of".)

I've seen this clue in the Universal, the Newsday, the King Feature Syndicate and The New York Times.

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