Possible Clues:

• Dope the prime minister is upset to reveal
• That's one that's as silly as a plain weight
• Foolish person
• Natural son trouble-maker owned
• It's a bit thick that it's so pure and heavy
• Just a ton, and not all there
• Unintelligent person
• Idiot! It's easy to point!
• Dunce, first to leave school after afternoon period is over
• A fool but no trouble: not unruly