Possible Clues:

• Grim to hesitate at the bone
• Starts to use massage on back bone
• Hard centre of lump? It's bone
• All about bird showing support for chest
• Figure that winger's broken bone
• Bone in chest or back? Let me think
• Problem after swallowing bird's bone
• Numb inside, under back bone
• Problem involving bird's breastbone
• Another name for the breastbone