Related Clues:
- Flivver fuel
- Methane, for one
- Ethane or methane
- Methane, e.g.
- Pump stuff
- ANAGRAM #2 (with 47-across)
- Electric alternative
- Nitrogen, for one
- Bug juice?
- Word that can precede the last word of the four longest puzzle answers
- Bunsen burner fuel
- Something graded between E and F?
- Rip-roaring good time
- Hydrogen, for one
- Chit-chat