| ALLOTROPE | A form of an element (9) |
| ISOTOPE | Any of the forms of an element with a different number of neutrons from each other |
| RADIOISOTOPE | Emitting form of an element |
| ISOTOPIC | Relating to different forms of an element |
| ISOTOPES | Various forms of an element with the same atomic number (8) |
| CHOCOLATE | Sweet treat consumed in the form of an egg (9) |
| ICLZZZZUS | Classic 1934 novel written in the form of an autobiography |
| UNITE | "Oneness" in the form of an association of workers; a coupling for pipes; an esemplastic device on an ensign, flag or jack; a students' club; a textile woven from a combination or fusion of fibres; or |
| JARDINIERE | Ornamental garden element in the form of an urn or stand for a plant or a collection of plants; or, a mixture of prepared seasonal vegetables as a garnish or accompaniment for meat or stew (10) |
| SPRIG | Little stem of flowers, foliage or berries; or, a representation of thus in the form of an embroidered motif or of a low-relief ornament applied to greenware (5) |
| SPIKE | Slang for a workhouse; its casual ward; a dosshouse or other shelter of last resort; or, a wheel-rung-like pointy thing manifesting in the form of an ear of corn, hypodermic needle, long metal nail or |
| FINIAL | From Latin for "end", an ornament or pommel in the form of an acorn, foliated fleur-de-lis, pine cone, poppy-head, spike etc at the end or top of a bench, curtain pole, gable or spire (6) |
| ATOM | (physics and chemistry) The smallest component of an element having the chemical properties of the element. |
| PROTON | Particle forming part of an atom's nucleus and determining the atomic number of an element (6) |
| SUBATOM | Constituent part of the smallest quantity of an element |
| NYMPH | Mythological nature spirit such as a dryad, naiad, oread or undine; or, an immature form of an insect having incomplete metamorphosis (5) |
| LARVA | Active immature form of an insect that develops into a pupa or chrysalis before becoming an adult (5) |
| GLOSSARY | Alphabetical list of specialist terms with definitions or explanations, often in the form of an appendix to a book (8) |
| ASHES | The -; trophy in the form of an urn used as a symbol of cricketing rivalry between England and Australia (5) |
| ROSE | Roman de la -; written by Guillaume de Lorris with a continuation by Jean de Meun, a medieval French poem in the form of an allegorical dream (4) |
