| SCOTSMAN | Flying -; designed by Mallard creator Nigel Gresley, the first locomotive to reach 100mph and first to circumnavigate the globe (8) |
| MALLARD | A wild dabbling duck; or, designed by Nigel Gresley, the fastest ever steam locomotive (7) |
| DARLINGTON | Locomotion No 1 departed from this Co Durham town as the first locomotive to haul a public railway passenger train |
| FLYING | - Scotsman; locomotive designed by Sir Nigel Gresley as part of the A1 class (6) |
| STAR | First locomotive to run on Brunel's broad gauge (5,4) |
| TRURO | City of ---, celebrated as the first British steam locomotive to have exceeded 100mph (5) |
| COWCATCHER | Frame at the front of a locomotive to clear the track (10) |
| MCINTYRE | First racer to top the 100mph average for a lap of the Isle of MANTT course. (8) |
| STEPNEY | Preserved 'A1X' 0-6-0T No. 55, the Bluebell Railway's first locomotive (7) |
| KIRTLEY | Matthew, First Locomotive Engineer of the Midland Railway [appointed 1844] (7) |
| TRAINEE | Apprentice taking the locomotive to the points (7) |
| QUILL | Drive - mechanism in electric locomotives to connect traction motors and the driven wheels (5) |
| GOOCH | First Locomotive Superintendent of the GWR (5) |
| DIESEL | Rudolf, the German behind something energising locomotives to begin with? (6) |
| ENGINEERING | Devising locomotive to go on European circuit |
| CROCKETT | American frontiersman introducing steam locomotive to Connecticut |
| CHOOCHOOTRAIN | Locomotive, to a toddler [OWL] |
| TANKENGINE | Locomotive to fail: no good stopping German one |
| MOTIVE | Reason for locomotive to drop four characters off (6) |
| TON | A unit of weight equal to 2,240 lbs avoirdupois; an informal word for 100mph, £100 or a score of 100; or, with definite article, fashionable society during the Regency era (3) |
