Related Clues:

• Pipeline contents
• Phase hotter than liquid
• Lit sign in a dark theater
• Take one's leave
• Helium e.g.
• Nitrous oxide, for one
• Word with ''mustard'' or ''natural''
• Ethane, for one
• Regular, plus or super
• Fuel on the range
• It's dispensed from a hose
• Word on a lighted sign
• Neon or argon
• Helium or oxygen
• Jetta fuel