TUNDRA
| Date | Clue |
|---|---|
| 2026-03-14 | 23-Across debut of 1999 |
| 2024-07-03 | Much of Greenland |
| 2021-01-11 | Frozen expanse |
| 2018-10-21 | About 10% of Russia |
| 2017-09-27 | Where caribou roam |
| 2017-05-04 | Arctic plain |
| 2016-11-25 | Land beyond the tree line |
| 2015-06-23 | Much arctic land |
| 2011-03-24 | Caribou's domain |
| 2008-09-03 | Treeless area |
| 2003-06-01 | Feature of northern Canada |