Possible Clues:

• Call attracting attention about bone — antelope
• Long-necked antelope
• Graceful African antelope
• Animal's bone found in bits
• One grazing bone — it's broken into two bits
• Current writer rejected African bounder
• Palebuck, small South African antelope
• Graceful antelope
• I pen rearing antelope
• Writer brought up current resident of Savannah