| Answer | Crossword Clue |
|---|---|
| ZINGS | Hums along. |
| WHIRS | Hums along |
| PURRS | Hums |
| CROONS | Hums. |
| DRONES | Hums. |
| DRONES | Hums |
| CROONS | Hums soothingly |
| WHIRS | Revolving hums |
| CROONS | Hums softly. |
| STRUM | Hum's partner |
| PURRS | Engine hums |
| STARS | Hum's biggest hit |
| ATUNE | "While mammy hums ...." |
| HAWS | Companions of hums. |
| PURRS | Hums like an engine |
| LLAMA | Mammal that hums to its young |
