| MIGHTY | Mass and energy extracted from a number having strength |
| USEFUL | Convenient American energy extracted from coal, say, and sent North (6) |
| NIL | Zero energy extracted from river |
| AWESOME | Wonderful start to analysis a€“ our team then associated with mass and energy (7) |
| ISOZYME | Protein, one very much unknown, with unknown mass and energy |
| OOMPH | Ordered hoop to limit mass and energy (5) |
| COMEDY | Clowning Buffalo Bill conserves mass and energy |
| MORE | Choice between mass and energy will give something extra? |
| CAPRI | A number having almost a month in a holiday resort (5) |
| ANAESTHETIC | A number having a stylistic principle |
| ANVIL | Energy is extracted from a base block of iron |
| EDUCT | A substance extracted from a mixture. (5) |
| OODLES | A great amount can be extracted from a good lesson (6) |
| DISPEL | Get rid of power in fuel with some energy extracted |
| MRRIGHT | Special man having strength to cross river twice (2,5) |
| FORTUNATE | Lucky having strength to catch big fish |
| ELBA | Italian island having strength for revolution |
| MATTER | A gas, liquid, solid or other basic structural component of the universe with a mass and volume; the subject of speech, thought, writing etc; a thing of consequence; or, a concern (6) |
| EIGHTY | A number having great influence after giving up work |
| WRITTEN | Summons a number, having corresponded (7) |
