| Answer | Crossword Clue |
|---|---|
| HUM | Run smoothly |
| PURR | Run smoothly |
| FLOW | Run smoothly |
| LIMPS | Doesn't run smoothly |
| SPUTTERS | Doesn't run smoothly |
| DEBUG | Make run smoothly again |
| HUM | Run smoothly, as a machine |
| PURR | Run smoothly, as an engine |
| HUM | Run smoothly, as an engine |
