| ROTENONE | Powerful insecticide obtained from the roots of derris (8) |
| REDSPIDERS | Mites sped with derris being sprayed |
| QUELL | Squirrelled away derris to put down (5) |
| DDT | A powerful insecticide partly hidden at last |
| ALIZARIN | Red pigment from the root of the common madder plant (Rubia tinctorum) that became the first synthesised natural dye in 1868 (8) |
| ASAFOETIDA | Brownish, bitter, resinous material obtained from the roots of some plants of the parsley family (10 |
| GINSENG | Substance obtained from the root of plants of the Panax genus, used as an ingredient of herbal tea ( |
| TAPIOCA | Beady starch obtained from the root of the cassava, used for puddings (7) |
| INULIN | Fructose polysaccharide obtained from the roots of elecampane and other composite plants, used medically to test kidney function (6) |
| MADDER | Red dye obtained from the root of a climbing plant (6) |
| ROSEMADDER | Pinkish pigment derived from the roots of a plant of the same name, used in the works of J. M. W. Turner (4,6) |
| HERITAGE | The roots of one child's game wrapped up in the present (8) |
| DERRIS | Containing rotenone, which insecticide dust is extracted from the roots of a type of climbing pea? (6) |
| ATHENIAN | Like the roots of democracy |
| KAVA | What narcotic drink is made from the roots of a type of pepper plant? (4) |
| SASSAFRAS | The banned carcinogen safrole is extracted from the root of this tree |
| BRIAR | Tobacco pipe made from the root of the plant Erica arborea (5) |
| RATOON | Sprout from the root of a plant [1966] |
| FOLLICLE | The gland or cavity at the root of a hair |
| MANDRAKE | Poisonous plant, the root of which is used medicinally or as a narcotic (8) |
