Related Clues:

• Mice and beavers do it
• Wear down slowly
• Chew on rawhide
• Mimic a mouse
• Work on a bone, dog-style
• Enjoy a bone
• Agitate (with ''at'')
• Act the rat
• Nibble persistently
• Chew (at)
• Work on a bone
• Work on ribs
• Nibble like a mouse
• Nibble away at
• Chew, like a dog on a bone