Fool in Massachusetts (3)
I believe the answer is:
ass
'fool' is the definition.
(both can mean a stupid person)
'in massachusetts' is the wordplay.
'in' indicates a hidden word.
'ASS' is hidden within 'massachusetts'.
(Other definitions for ass that I've seen before include "Turkey" , "Braying animal" , "Pompous person" , "Pompous fool or beast of burden" , "Long-eared animal" .)