| CETANE | ___ rating, a measurement of the performance or quality of diesel fuel (6) |
| FATHOM | A measurement of the depth of water equivalent to six feet (6) |
| AWARD | To bestow on for performance or quality (5) |
| ELF | Spirited part of diesel fuel? (3) |
| ALAPA | The first section of the performance of a raga |
| VIRTUOSO | ...being a prodigy of the performance arts - and deadly virus too? (8) |
| WEIGHT | Force experienced by a mass as a result of gravity; or, a measurement of such (6) |
| BESSEL | He performed the first accurate measurement of the distance to a star and predicted the existence of Neptune (6) |
| TIMBRE | What describes the tone colour or quality of a voice or sound? (6) |
| RADIUS | Word, from "spoke, rod", for a measurement of distance from a centre point, whether in a mathematical or anatomical context (6) |
| OCTANE | ____ rating, standard measure of a fuel's resistance to pre-ignition due to compression (6) |
| ASSESS | Evaluate or estimate the nature, ability, or quality of. (6) |
| OUTPUT | In France where time and place is a measurement of one's economic value (6) |
| DERVLA | Ballykissangel star Ms Kirwan provides diesel fuel to the French (6) |
| ENRICH | Improve the flavour or quality of (6) |
| SEAMAN | Possibly rating a former England goalkeeper (6) |
| ISLAND | Foulness, perhaps, of diesel banned at regular intervals |
| POLLENCOUNT | Often quoted on weather forecasts, this is the measurement of the number of grains discharged from the male part of a flower, per cubic metre of air (6,5) |
| REAPPRAISAL | The assessment or estimation again of the worth, value or quality of a person or thing (11) |
| GEODESY | Branch of science concerned with the precise measurement of the size and shape of the earth or large portions of it (7) |
