Related Clues:

• Waldorf salad ingredient
• Granola bit
• Hardware item
• Madman
• Filbert, e.g.
• It's tough to crack
• Acorn, essentially
• Aficionado
• Bit of hardware
• Enthusiast plus,
• Squirrel's treat
• Trail mix bit
• Nut job
• Hazel, for one
• Bolt's partner