Related Clues:

• Chew on, as a bone
• Act like a beaver
• Bother persistently
• Gradually corrode
• Wear down little by little
• Bite like a beaver
• Chew on celery, e.g.
• Nibble away
• Prey on one's mind
• Emulate a beaver
• Wear down
• Bother incessantly
• Work like a beaver
• Bite away at
• Chew on