Related Clues:

• Laborious way to open an envelope
• Feature of some saunas
• Old engine power
• What spins turbines at thermal power stations
• Healthful way to cook
• Cook meal in vacated staffroom
• Teakettle emanation
• Vitality, so to speak
• Energy shown by second eleven
• Engine activator, sometimes
• Prepare, as mussels
• Antique engine's power source
• Power demonstrated by singular crew
• Cook eats roast mutton for starter
• Power in second eleven, perhaps