Answer:

nut

Answer	Crossword Clue
NUT	Bread or butter ender
NUT	Cashew
NUT	Off-the-wall guy

NUT	Screwball
NUT	Brazil or pecan
NUT	Chest or dough finisher
NUT	Hazel, for one
NUT	Flake
NUT	Litchi or flake
NUT	Macadamia, for one
NUT	Pea ender

NUT	Fanatic
NUT	Kola, e.g.
NUT	Almond, e.g.
NUT	Something you might have a crack at
NUT	Squirrel's stash
NUT	Hickory seed
NUT	Filbert, e.g.
NUT	Fastening device

NUT	Enthusiast, plus
NUT	Eccentric
NUT	Trail mix bit
NUT	Big-time fan
NUT	Bolt's mate
NUT	Enthusiast
NUT	Tough .. to crack
NUT	Waldorf-salad tidbit

NUT	Avid devotee
NUT	Ding-a-ling
NUT	Kook
NUT	Weirdo
NUT	Cashew, for one
NUT	Geometric fastener
NUT	Diehard fan
NUT	Crackpot

NUT	Fancier and then some
NUT	Wacko
NUT	Devotee
NUT	Oddball
NUT	Pecan or hickory