Possible Clues:

• Laugh at or deride
• Make fun of short trip carrying icy-sounding rubber
• How I'd 1100 to make fun of it in the rule
• I rid clue of derision
• Derision that's clear in much of republic on reflection
• Deliver one cryptic clue to laugh at
• Purge one dreadful clue that could produce this?
• Current detectives back in control show up
• That's how I'd get 1100 in the rule and make fun of it
• Make a mockery of the law, holding up police after start of investigation