Knucklehead (5)

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moron

idiot

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

This is all the clue.

(Other definitions for moron that I've seen before include "Wally" , "Blockhead" , "Simpleton" , "Idiot" , "Cretin" .)

I've seen this clue in The Wall Street Journal.

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