| GAMMA | Greek letter denoting the heat capacity ratio in thermodynamics |
| BETA | Greek letter denoting a trial version of a product, or the second in a series (4) |
| THETA | Greek letter denoting an unknown angle in geometry |
| CLAUSIUSTHEOREM | Law in thermodynamics that states if a system is taken through a cycle, the sum of the heat added, w |
| DISSIPATION | In thermodynamics, the result of an irreversible process in which energy transforms from an initial form to a final form |
| ALPHAANDOMEGA | Greek letters denoting two extremes (5,3,5) |
| ISENTROPIC | In thermodynamics, what are things of equal or constant entropy? (10) |
| ENTROPY | Measure of disorder, in thermodynamics |
| HEAT | Energy transferred in thermodynamics |
| KELVIN | William Thomson, 1st Baron - - -, British physicist noted for his work in thermodynamics and electricity (6) |
| LATENTHEAT | Energy released in thermodynamics |
| JOULE | Unit in thermodynamics |
| DIACRITIC | Sign above or below a letter denoting its different phonetic value (9) |
| VIP | Letter denoting some club lounges |
| ALPHA | Letter denoting first grade (5) |
| PIPI | Double ratio in food from the sea |
| SCALE | Distance ratio in the corner of a map |
| EPIC | Large-scale letter for mathematical ratio in City district (4) |
| ENOUGH | Word denoting the point or moment where the joy turns cloy, the fun becomes done, the thrill turns shrill or a treat tastes like defeat (6) |
| ARTERIAL | A retrial in motion, denoting the importance of the route (8) |
