| BROMINE | Toxic element turning up in seawater is molybdenum (7) |
| CULL | Reduce element turning up in local luckily (4) |
| TEPID | Seawater is never this warm (5) |
| BISMUTH | Medicinal element turning stomach in senior clergyman, missing work (7) |
| RHENIUM | Primarily rare heavy element noticed in uranium, molybdenum (7) |
| ARSENIC | Toxic element in care homes finally rehabilitated (7) |
| EXOTICA | Converted toxic elements in each group of foreign objects (7) |
| LEADOFF | Start getting ill after toxic element (4,3) |
| IRON | With manganese, zinc, copper and molybdenum, this is a trace element in the soil, needed by plants in very small quantities (4) |
| SILVER | Used in cloud-seeding to create rain and associated with the moon, a metal originally forged in supernova explosions that also exists dissolved in seawater (6) |
| POTASSIUM | Occurring in seawater and first isolated by Sir Humphry Davy in 1807, an element that derives its symbol "K" from the Latin "kalium" (9) |
| LEAD | Also called plumbum, a toxic element whose use in everyday life by the Ancient Romans is said by some to have contributed to the empire's downfall (4) |
| SODIUMCHLORIDE | It's found in seawater and barnacles, in short |
| IODINE | Element contained in seawater (6) |
| CRANIUM | Cummings primarily a toxic element, not primarily a brainbox (7) |
| NEODYMIUM | What's shattered me? Mind you, it is a toxic element |
| THALLIUM | Toxic element formerly used in rat poison |
| RADIUM | Toxic element runs for street in sports venue (6) |
| MARINE | Horse drinks in seawater (6) |
| RINSE | Lightly wash a bit of gear in seawater |
