Related Clues:

• Lunatic
• Bolt fastener
• Squirrel's snack
• Beef, e.g.
• Gorp morsel
• Butcher's goods
• Herbivores avoid it
• Vegan's no-no
• Enthusiast
• Granola morsel
• Essential point
• Threaded fastener
• Nitty-gritty
• Acorn or almond
• Essential part