Related Clues:

• Pump stuff
• 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
• Catch requirement
• Chit-chat
• Pump output
• Word after mustard or natural
• Fill 'er up filler
• Krypton or radon, e.g.