| Answer | Crossword Clue |
|---|---|
| MAINSPRING | Chief motive power |
| MAINSPRING | Chief motive. |
| MAINSPRING | Chief motive |
| STEAM | Motive power. |
| OXEN | Primitive motive power. |
| ENGINE | Motive power source |
| OXEN | Slow motive power |
| HOSS | The shay's motive power |
| STEAM | Kind of motive power. |
| HUSKY | Motive power in Alaska |
| DEER | Motive power in Lapland. |
| PROPELS | Gives motive power to. |
| COACHHORSE | Motive power of yore |
| OXEN | Motive power of the Forty-Niners. |
| FANS | Ducted ..., motive power of new flying platform. |
