Possible Clues:

• Ear bone also known as the anvil
• Bone idle new carer under supervision initially
• Anvil-shaped bone of the middle ear
• Bone that's better known as the anvil
• Small bone of the inner ear
• One of the small bones in the middle ear
• One magnet's orientation to hold copper for anvil
• The anvil of the ear
• Anvil bone of the ear
• In to complain: customer with bone