Related Clues:

• Extremely important to be censorious
• Unpleasant exercise rota involved in dance
• Very important reviewer left to file article
• Vital to be discriminating
• One in an armchair perhaps, half-hearted, not approving
• It's vital to be censorious
• Serious fault-finding
• Private joke, funny, but for king it's insulting
• Disparaging outsider's first to take part in unfortunate jeer at VIP
• In some danger of finding fault
• Censorious
• Finding fault may be crucial
• Decisive — grave
• Crucial, decisive
• Calling attention to errors and flaws