Possible Clues:

• A farce, race had to be fixed
• Deception, fishy fizzy drink?
• Announcement in Daily Express leader elicits mockery
• Party performance of Parisian, with cleaner answer given first
• 26 down's one day cuts into cleaner energy
• Fake fish produced without a head
• Empty pretense
• Absurd pretence contrived with cleaner taking the place of leader
• It's a riddle when chief replaces prince at head of procession
• Game in which the answer is acted out