Answer: crackpot

AnswerCrossword Clue
CRACKPOTNutty
CRACKPOTEccentric
CRACKPOTNut
CRACKPOTEccentric one
CRACKPOTMember of the lunatic fringe.
CRACKPOTEccentric.
CRACKPOTErratic one: Slang.
CRACKPOTLoon
CRACKPOTHarebrained
CRACKPOTOdd fellow
CRACKPOTFar-fetched, as an idea
CRACKPOTUnrealistic one
crackpotAn eccentric or foolish person
crackpotan eccentric person