Related Clues:
- Sound of a Maltese or motor
- Emulate a contented cat
- Kitty and Tom are pleased to do it
- Persian murmur
- Sound from a contented Siamese
- Happy cat sound
- May sounds with a closed mouth
- Noise a happy cat makes
- Happy cats do it
- Sing with one's mouth closed
- Not quite sing
- Sound from a Jaguar engine, but not a jaguar
- Pulled up car making low vibrant sound
- Cat's utterance
- Drum starter?