Answer: nutsy

AnswerCrossword Clue
NUTSYBats
NUTSYBananas
NUTSYCuckoo
NUTSYBonkers
NUTSYCracked
NUTSYOff one's trolley
NUTSYCrackers
NUTSYCockeyed
nutsyInsane
nutsycrazy (insane (mentally unsound))