Related Clues:
- Had smash "Stars"
- "Downward Is Heavenward" band
- Noise of a contented feline
- Emulate a happy cat
- Almost sing
- Express contentment, in a way
- Sound of a happy feline
- Sound of a satisfied Siamese
- Good noise from an engine
- Half-cut people murmur
- Cat's contented sound
- Refrigerator noise
- Reversing finished, posh car's engine's sound
- Backing up, luxury car makes vibrating sound
- Air-conditioning sound