Possible Clues:

• Staple food in second and last course reduced
• Weeding spade
• Vegetable turned up in emptied dishes
• Commoner's King Edward?
• Northern Irish party's rejected Murphy
• Portion of Christmas pudding for Charlotte perhaps
• Sally's first sweet potato
• Provincial party's set up — here's a bit of food
• Eyed food
• Vegetable in this pudding