| Clue | Source | Date |
|---|---|---|
| Planet mostly icy, say, containing type of quicksilver (8) | ||
| Containing quicksilver | Wall Street Journal | 12 Mar 2022 |
| Old police force comes up in crime question - it's like something out of Quicksilver | Irish Times Crosaire | 23 Oct 2019 |
| Kind of oxide |