| Clue | Source | Date |
|---|---|---|
| Radioactive element; symbol Ac | Mirror Quiz | 06 Sep 2024 |
| Radioactive element whose atomic number is 89 | ||
| Element, mostly temporary one, we must think | The Times Cryptic | 30 Nov 2023 |
| Element of expanded account? | The Telegraph Toughie | 28 May 2021 |
| Something found in each radioactive element | ||
| Mostly working with university, in one's element | ||
| Radioactive element in core of reactor – in minutia, fancifully | ||
| Element #89 | ||
| Radioactive element that glows blue in the dark |