Foolish, idiotic (6)

I believe the answer is:

stupid

I believe this is a double definition.

'foolish' is the first definition.
(similar in meaning)

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

(Other definitions for stupid that I've seen before include "Unintelligent, really thick" , "Crass" , "Ass" , "Daft" , "Lacking wit or intelligence" .)

I've seen this clue in The Sun.

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