Possible Clues:

• Nonsensical
• Curious getting £500 change? Absurd!
• Alternative to “ridiculous” one’s put out
• Could sir initially undertake manoeuvres? That’s daft!
• Farcical game’s cut short and one croupier’s losing support
• Ours, lucid, can be made silly
• Absurd or farcical
• Absurd American after developing crude oil without energy
• Absurd English not to be found in our clues, I'd fancy
• Utterly laughable