| CIRROCUMULUS | A high cloud of ice crystals grouped into small separate globular masses (12) |
| VIRGA | From Latin for "branch, rod, twig", a term for an observable streak, wisp or "jellyfish cloud" of ice crystals, raindrops or snowflakes that evaporates before hitting Earth (5) |
| CIRRUS | Genus of wispy, high altitude clouds of ice crystals (6) |
| GALAXY | From the Greek meaning 'milk',a gravitationally bound system of billions of stars, grouped into one of four types by Edwin Hubble (6) |
| CIRCUS | Last of air removed from high cloud and carbon injected as entertainment (6) |
| ALTOCUMULUS | Middle-altitude cloud genus characterised by globular masses or rolls in layers or patches (11) |
| AGGREGATED | Grouped into a class |
| SPHERES | What is an alternative expression for globular masses (7) |
| SORTED | Grouped into categories |
| VAPOURTRAILS | Streams of ice crystals in the wake of aircraft (6,6) |
| CIRROSTRATUS | Thin, high clouds |
| SNOW | A fall or blanket of ice crystals; a lemon- or vanilla-flavoured pudding resembling such; a winter; or, a whitefleshed variety of apple (4) |
| HOAR | A ___ frost drapes the garden in a coat of ice crystals (4) |
| FIRERAINBOWS | *Phenomena created by sunlight refracting through ice crystals in clouds |
| BENTO | _ box, a thin box divided into compartments which contain small separate dishes comprising a Japanese meal (5) |
| SNOWFLAKE | Clump of ice crystals, small, at present with fellow on loch (9) |
| CLOUDS | Visible masses of ice crystals and/or water droplets. |
| RIME | The white, opaque, granular deposit of ice crystals formed on objects that are at a temperature below the freezing point. |
| SNOWFALL | Precipitation descending from clouds in the form of ice crystals (8) |
| CIRRI | They're comprised of ice crystals |
