Related Clues:

• Become rusted
• What rodents do
• Cause corrosion
• Destroy slowly
• Work on, as a bone
• Agitate, with "at"
• Imitate a beaver
• Chew away at
• Act the rodent
• Eat like a rat
• Emulate a mouse
• Beleaguer, with 'at'
• Use the teeth to erode
• Work on a bone, say
• Become rusty