Possible Clues:

• Unusual opening of Parliament could be this one
• Meat (from behind?)
• Seat in which there's one sitting after the game
• Hind part; small remnant
• -- Parliament, remnant of the Long Parliament after 1648
• Sport with politician in historic Parliament
• Drink taken by leader of pirates as booty?
• Strange proceedings just begun in Parliament
• Whoopee-cushion activator
• Roast type