| NEOGENE | First epoch of the Neogene Period of the Cenozoic Era, lasting from about 23 to 5million years ago (7) |
| TERTIARY | Old term for the period of geological time that constituted the Paleogene and the Neogene periods of the Cenozoic Era (8) |
| PALAEOZOIC | The geological era lasting between about 541 and 252 million years ago (10) |
| MIOCENE | First epoch of the Neogene period, extending from around 23 million to 5 million years ago (7) |
| PLIOCENE | Second epoch of the Neogene period in the Cenozoic era in the geologic timescale (8) |
| PLEISTOCENE | First epoch of the Quaternary period, followed by the present Holocene epoch (11) |
| EOCENE | Epoch of the Cenozoic era (6) |
| SNOW | Solid form of water that crystallizes in the atmosphere and falls to Earth. This material covers, permanently or temporarily, about 23 percent of Earth's surface. (4) |
| NEOCENE | Geologic period within the Cenozoic era (7) |
| TROPICOFCRICORN | Line about 23 degrees south of the equator (look down after reading letter 9) |
| TROPICS | Warm regions within about 23 degrees latitude from the equator (7) |
| BORNEO | Large island in south-east Asia (about 300,000 sq miles; pop about 23 million) (6) |
| CROCODILE | The largest in captivity is about 23 feet long |
| EURO | It's worth about 23 nickels |
| ADMIRALS | Naval officers disciplined lads - about 23? (8) |
| AREA | About 23 square miles, for Manhattan |
| EARTH | The 1 across 9 down occurs because the ..... is tilted at about 23 degrees on its axis (5) |
| WEREALL | The Tories tell a whinger about 23 across's message (4,3,2,4,8) |
| POLKAS | Two US presidents, one not mad about 23 25 (6) |
| NODOUBTATALL | It's not about 23 down finding answer? Everyone is definitely sure about that! (2,5,2,3) |
