Idiot in Massachusetts (3)

I believe the answer is:

ass

'idiot' is the definition.
(thesaurus)

'in massachusetts' is the wordplay.
'in' says the answer is hidden in the clue.
'ASS' is hidden within 'massachusetts'.

(Other definitions for ass that I've seen before include "jack" , "Blockhead" , "Animal of horse family" , "Braying creature" , "Horse relative" .)

I've seen this clue in The Times.

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