| Clue | Source | Date |
|---|---|---|
| Apocalyptic cold period | The Telegraph Quick | 10 Oct 2026 |
| Cold war aftermath? Tough to secure outright victory on retreating! | ||
| Dark and cold period following the use of atom bombs (7,6) | ||
| Hypothetical apocalyptic climate effect | LA Times Daily | 10 Aug 2019 |
| Hypothetical apocalyptic climate effect | ||
| Hypothetical apocalyptic climate effect | ||
| Aftermath of atomic war |