Related Clues:

• Narwhal feature
• Walrus feature
• Ivory source
• Large 16-Across
• Back biter?
• It may be filled before it bites
• Scrimshaw surface
• Mammoth tooth
• Elephant feature
• Food grinder
• (K) Type of tooth
• Canine's relative
• Mastodon feature
• Mammoth growth
• Elephant tooth