| SEGUES | Makes the transition |
| SEGUE | Make the transition |
| SECOND | Unit of time defined as "the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom" (6) |
| SAHEL | Region marking the transition from the Sahara to the savanna? (5) |
| RENAISSANCE | Art movement that originated in Europe between 14th and 17th century marking the transition from the middle ages to modernity |
| DAWN | Symbolic of new beginnings, the Aurora, first light or sunrise that marks the transition from night to day (4) |
| BELTANE | Gaelic name of the "bright fire" or "lucky fire" dew-collecting, floral crown-adorning, pole-dancing May Day festival traditionally marking the transition from spring to summer (7) |
| FASTBREAK | It's part of the transition game |
| METAL | Any of the transition elements |
| CROSSED | Angry young editor made the transition |
| IFEELPRETTY | "West Side Story" song, or a hoped-for response after experiencing the transition in this puzzle's w |
| ECOTONE | Term for the transition area between two distinct environments or biomes (7) |
| CHANGEOVER | Alter a set of six for the transition from one system to another |
| ROB | Environmental activist Hopkins who co-founded the Transition Network |
| TECHNETIUM | Radioactive metallic element of the transition series produced by deuteron bombardment of molybdenum (1O) |
| LAYERS | What you might dress in during the transition from winter to spring |
| NIOBIUM | Chemical element, one of the transition metals (7) |
| MIXEDECONOMY | "He presided over a Government [promoting] the transition from capitalism to ____" (Roy Hattersley, on Clement Attlee) |
| RITEOFPASSAGE | Ritual which celebrates the transition from one phase of life to another (4,2,7) |
| MANET | French painter, a pivotal figure in the transition from 9 Across to Impressionism (5) |
