Daft individual (6)

I believe the answer is:

nitwit

(Other definitions for nitwit that I've seen before include "Informally, a foolish person, featherbrain" , "Birdbrain" , "Fool, idiot" , "Silly person (colloq.)" , "Foolish person like funny louse?" .)

I've seen this clue in The Guardian.

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