| STONEAGE | Stage one perhaps in the development of civilisation |
| EUROPEAN | A pure one perhaps in the Common Market (8) |
| CUTTINGEDGE | Latest or most advanced stage in the development of something, as in trimming the sides of a lawn! (7,4) |
| SUGER | Advisor to both Louis VI and Louis VII whose supervision of the rebuilding of Saint-Denis as its abbot was key in the development of the Gothic architectural style (5) |
| YOUTH | Stage of adolescence between childhood and maturity; juveniles collectively; or, the early days in the development of something (5) |
| ABE | ___ Edgington (horse depicted in The Horse in Motion, which is widely regarded as a milestone in the development of motion pictures) |
| ONTOGENESIS | The sequence of events involved in the development of an individual organism |
| INSTAR | The stage in the development of an insect between any two moults (6) |
| SPINABIFIDA | Congenital defect in the development of the vertebral column (5,6) |
| CREED | Frederick George ____ was a key figure in the development of the teleprinter |
| MILESTONE | Significant stage in the development of something (9) |
| STEP | A stage in the development of a tot (4) |
| RENOIR | Leading painter in the development of the Impressionist style (6) |
| GENISTA | Stage in the development of yellow flowering shrub (7) |
| LARVA | Stage in the development of an insect (5) |
| STADIUM | A stage in the development of sports ground? (7) |
| PROSPECT | In the Men's Stage 1 race of the Santos Tour Down Under, to be held on Tuesday January 21 2025, in which suburb does the race that finishes in Gumeracha begin? (8) |
| EDISON | Phonograph inventor who was key in the development of the first practical incandescent light bulb (6 |
| LESPAUL | American jazz guitarist and pioneer in the development of the solid-body electric guitar (3,4) |
| PERICLES | Fifth-century BC politician who played a major role in the development of the Athenian empire (8) |
