| BORON | A very hard, almost colourless crystalline metalloid element that in impure form exists as a brown amorphous powder (5) |
| TE | A brittle silver-white metalloid element that is related to selenium and sulfur. |
| EDTA | Short Chemistry term for a colourless crystalline compound used as an antidote to metal poisoning (1-1-1-1) |
| MALIC | Colourless crystalline acid occurring in unripe apples and other fruits, imparting a sour flavour (5) |
| NITROGEN | Element that in liquid form is used to treat warts (8) |
| LYMPH | Almost colourless fluid containing mainly white blood cells (5) |
| OPALESCENT | Showing changing colours of almost colourless perfume on ring (10) |
| UREA | Colourless crystalline compound (4) |
| CYANIDE | A potentially deadly chemical that exists as a colourless gas or in crystal form (7) |
| SELENIUM | Element named after the Greek moon goddess that exists as a silvery metal or red powder (8) |
| JASPER | Opaque, impure form of quartz; red, yellow, brown or dark green in colour, used as a gemstone or in ornaments (6) |
| DUN | Greyish brown; a horse with a coat of this colour, combined with a black mane and tail; an importunate debt collector; a hill-fort; or, a fishing fly resembling a subimago mayfly (3) |
| TEAPOT | A spouted vessel such as a Brown Betty, often kept warm with a cosy (3,3) |
| OASIS | Nothing like exists as a place to get a drink |
| PORPHYRY | A very hard rock of a purple and white colour that is used in sculpture (8) |
| AGATE | An impure form of quartz used as a gemstone and in making pestles and mortars (5) |
| ARALSEA | It exists as a real lake |
| IBIS | International Baccalaureate exists as a wader (4) |
| INDIVIDUAL | Single person who exists as a distinct entity (10) |
| REPTON | Regarded as the successor to Capability Brown, a landscape designer who presented "before" and "after" views in watercolours in distinctive red leather books (6) |
