Related Clues:

• Refined fossil fuel
• 'What a ___!'
• Jupiter, mostly
• Argon, for one
• Post-dinner issue
• Car-tank filler
• Guzzled product
• Really fun time
• Marsh emanation
• Pipeline contents
• Phase hotter than liquid
• Helium e.g.
• Nitrous oxide, for one
• Word with ''mustard'' or ''natural''
• Ethane, for one