| Clue | Source | Date |
|---|---|---|
| Materials processed in plant | The Guardian Cryptic | 02 Jan 2023 |
| Various materials produced in plant | The Times Cryptic | 11 Jan 2017 |
| Materials used to portray pond plant | The Telegraph Cryptic | 31 Mar 2015 |
| Long, narrow cloud | ||
| Cirrus cloud | ||
| Spreading cirrus cloud. | ||
| Cirrus cloud. |