Related Clues:

• Motherboard's heat sink, e.g
• In retrospect, 'rubbish' opera right? Its content is wet!
• Hotel diner finds radiator
• Topless American playhouse which gets you hot?
• Device that warms
• Radio Rat could be cooler in motor
• Home heater or engine cooler
• Energy in earth damaged by the sun perhaps
• Wireless picks up origins of alien transmission — reading it could heat things up
• Warming apparatus
• What warms big building on Broadway initially lacking temperature
• Criminal three packing a gun once in America