Possible Clues:

• Naturally disposed toward losing the head with checkmate
• Terminating or concluding
• Conclusion of election: extrem­ists' date in government
• Broken dinghy discovered at last
• 'Though we live in a world that dreams of ... / that always seems about to give in' (B Kennelly)
• One of a "Choose Your Own Adventure" book's many
• Denouement that's heart-rending? Not half
• What a spoiler might give away
• Death is imminent when head chopped off..
• Veiled legend in grand finale