Related Clues:

• Acorn or almond
• Squirrel treat
• See 68-Across
• Hazel follower
• Praline morsel
• Zany
• Violin part
• Bolt holder
• Seed
• Weirdo
• Waldorf salad ingredient
• Granola bit
• Hardware item
• Filbert, e.g.
• It's tough to crack