| PRUSSIC | --- acid, alternative name of the chemical compound hydrogen cyanide (7) |
| NITRE | Mineral form of the chemical compound potassium nitrate, also known as saltpetre (5) |
| FANGOON | Alternative name of the Ent Treebeard in J. R. R. Tolkien's The Lord of the Rings, from the Elvish language of Sindarin (7) |
| POTENCY | The effective power of marijuana and the central components of hydrogen cyanides (7) |
| ALMONDS | The poisonous gas hydrogen cyanide smells of what nutlike fruits? (7) |
| MINERAL | An inorganic substance such as jade, lazurite, quartz or turquoise formed naturally in the earth and rocks; or, any of the chemical elements required by the body (7) |
| HALOGEN | Any of the chemical elements astatine, iodine, bromine, chlorine and fluorine (7) |
| WOLFRAM | Alternative name of tungsten (7) |
| ARSENIC | Poisoner tainted sarnie with dash of cyanide (7) |
| SCEPTIC | Trace of cyanide found in poisoned cynic (7) |
| NITRILE | Any of a group of organic cyanides (7) |
| CASSAVA | South American plant whose edible root must be prepared to remove traces of cyanide |
| ATONEMENT | Day of ---, alternative name of the Jewish holiday Yom Kippur (9) |
| SPECTACLED | Alternative name of the Andean Bear, the only bear native to South America (10) |
| NICEDAY | Pleasant anagram of "cyanide" |
| JOVE | Alternative name of the ancient Roman god Jupiter (4) |
| PALMAE | Alternative name of the plant family Arecaceae, from Latin, 'hand front' (6) |
| ACID | An extremely poisonous aqueous solution of hydrogen cyanide (7,4) |
| POISONS | Cyanide and arsenic, e.g. |
| STAR | Any one of the celestial bodies in which atomic nuclei bind to form many of the chemical elements in the process of nucleosynthesis (4) |
