"Beats me" (5)

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6 8 1,4,2,4 5* 11*

'beats me' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for dunno that I've seen before include "I'm in the dark" , "I can't help" , "It beats me" , "I don't know (informal)" , "search me" .)

I've seen this clue in the USA Today, the LA Times, The New York Times, The Wall Street Journal and the Universal.

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