| Clue | Source | Date |
|---|---|---|
| Turn up with right band, sounding pleased | ||
| Sounding pleased (like a cat) | ||
| Good vibrations? | LA Times Daily | 23 Dec 2022 |
| Operating smoothly, as an engine | New York Times | 06 Mar 2018 |
| Operating smoothly, as an engine | ||
| Dog hugging Rover, totally gutted in sounding like a cat | ||
| Audibly satisfied, as a kitten | ||
| Well content | ||
| Like a contented cat |