| Rating | Solver | Clue |
|---|---|---|
| TURBINE | Water-driven wheel | |
| HURDY-GURDY | In California, a water wheel with radial buckets, driven by the impact of a jet. | |
| WATER MOTOR | A water wheel; especially, a small water wheel driven by water from a street main. | |
| MANTLE | A penstock for a water wheel. |