Related Clues:

• Acorn, e.g.
• Maniac
• Filbert, for one
• Pecan or cashew
• Hexagonal holder
• Loony tune
• Diabolical one
• Bar morsel
• Squirrel food
• Wrench's target
• Wicked one
• Odd character
• Encomium writer
• Cashew or filbert
• Diehard fan