| SIEGEL | Benjamin 'Bugsy' ___, gangster who played a central part in the development of Las Vegas as a gambling centre (6) |
| ACES | Las Vegas A's |
| IGOR | He played a central role in Frankenstein's reinvigoration. (4) |
| AUR | Saheb Biwi ____ Gangster |
| CAPONE | Al ___, gangster (6) |
| MOB | The ___ (gangster's gang) |
| CUTTINGEDGE | Latest or most advanced stage in the development of something, as in trimming the sides of a lawn! (7,4) |
| ABE | ___ Edgington (horse depicted in The Horse in Motion, which is widely regarded as a milestone in the development of motion pictures) |
| RICKSHAW | Form of transport which was a central part of a Matt Baker Children in Need fundraising challenge |
| 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) |
| PERICLES | Fifth-century BC politician who played a major role in the development of the Athenian empire (8) |
| EDGE | Knife _, a critical point in the development of a situation, process of making a decision, etc (4) |
| FRANKSINATRA | US singer and actor, a member of Las Vegas' Rat Pack, who is reported to have liked to hang-out in Palma nightclubs when he visited Mallorca in the 1950s (5,7) |
| BUGSY | Biopic starring Warren Beatty as a fabled crackpot gangster who helped build Las Vegas |
| GIOTTO | _ Bizzarrini, he played a key role in the development of the Ferrari 250 GTO (6) |
| UNCLE | Looking back, the Spanish copper admits central part in detention of family member (5) |
| EDISON | Phonograph inventor who was key in the development of the first practical incandescent light bulb (6 |
| ENGINE | Steam -; Thomas Newcomen's invention that played a pivotal role in the development of industrialisation (6) |
| YOUTH | Stage of adolescence between childhood and maturity; juveniles collectively; or, the early days in the development of something (5) |
| MAXWEBER | German economist and sociologist; a central figure in the development of sociology (3,5) |
