Related Clues:

• Nibble persistently
• Chew (at)
• Work on ribs
• Nibble like a mouse
• Nibble away at
• Chew, like a dog on a bone
• Vex, with ''at''
• Emulate a marmot
• Nibble ceaselessly
• Chew on wood
• One thing rodents do
• Munch on like a mouse
• Not just nibble
• Nibble away (on)
• Chew like a chipmunk