Related Clues:

• Fan noise
• Text
• Persian output
• Copy cats?
• Smell strongly
• Sound of a fine-tuned engine
• Be busy
• Souped-up engine sound
• 'I'm happy' in Siamese?
• Sound of satisfaction
• Engine production
• Gulp without a pause
• Big gulp
• Big belt
• ''I'm happy'' in the Siamese?