Possible Clues:

• Lamb cut by jagged rock sticking forward
• Transmit over cliff to get meat for stew
• G for joint of mutton?
• In sink starts to clean rancid object — cheap cut of mutton
• Get it in the neck from the butcher in post over Charlie contacting local paper
• Bluff dons convey a cheap cut
• Some neck in butchers offering credit for second place in despatch
• Cut of meat for Cliff in post?
• Some mutton, cold, provided in fancy gardens
• Surprising dangers eating cold meat