Related Clues:

• Sound like a well-tuned engine
• Stingless flier
• Siamese comment
• ''I'm happy'' in Siamese?
• Hive member
• Remotely controlled craft
• Run smoothly
• Helicopter sound
• Good engine sound
• Petted pet's sound
• Sound of a well-tuned engine
• Say coquettishly
• Chopper sound
• Pilotless plane
• Fluttering sound