| ALLOTROPE | Any of two or more physical forms in which an element can exist |
| PYROMETER | Try more physical exercise shortly to show how hot it is |
| LEADBYTHENOSE | Dominate an element - can one scent it here? |
| FIGURES | Physical forms associated with computers (7) |
| EVAPORATION | The process by which an element or compound changes from its liquid state to its gaseous state. |
| ISOTOPE | What is any of two or more forms of a particular chemical element (7) |
| ALLELE | Any of two or more variants of a gene (6) |
| EDITION | From "bring forth, publish", word for one of the forms in which a book or newspaper is produced; a press run; a single copy from this set; a reproduction; or, any version (7) |
| ATOM | Any element's smallest particle that can exist either alone or in combination |
| REGULI | Metallic forms in which one pistol turned up (6) |
| SELDOM | Forms in which learner appears backward on a few occasions |
| LOWERCLASSES | Junior forms in which the humbler ranks are found (5,7) |
| ENERGY | From Greek for "work", one's pizzazz, vigour, zest or zip; or, a scalar quantity and quantitative property that can exist in forms including kinetic, potential and thermal (6) |
| ECOSPHERE | Region of a planet in which life can exist |
| JETE | Ballet jump with various forms in which a dancer springs from one foot to land on the other; French, 'thrown' (4) |
| SIRENIAN | Any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like f |
| ISOTONE | Any of two molecules that share the same number of neutrons |
| OUTIE | "Severance" term for the part of one's psyche that can exist in the real world |
| TRAY | A board, salver or shallow receptacle in various forms in/on which to bake brownies or flapjacks, carry crockery, grow seedlings, hold papers or present visiting cards (4) |
| NEON | They say any element can be used for light |
