| Clue | Source | Date |
|---|---|---|
| Environmentalists in action! (3-8) | The Guardian Quick | 13 Sep 2025 |
| Environmental activists (11) | ||
| Based on a common feature of their names, what 17-, 23-, 36- and 51-Across are well-suited to be? | LA Times Daily | 25 Sep 2019 |
| Based on a common feature of their names, what 17-, 23-, 36- and 51-Across are well-suited to be? | The Washington Post | 25 Sep 2019 |
| Based on a common feature of their names, what 17-, 23-, 36- and 51-Across are well-suited to be? |