Related Clues:
- Organ could produce gas
- Third-most abundant gas in the atmosphere
- Gas used in light tubes
- Greek festival inspires king – it’s something in the atmosphere
- With 67-Across, what five pairs of answers in the circles represent
- Part of a big cake
- Liberal philosopher's bed
- Tiramisu part
- Birthday cake part
- Liberal philosopher’s coat
- Crust, mantle or core
- Inert gas in the atmosphere
- Fluorescent tube filler
- Neighbor of krypton on the periodic table
- Noble gas used in lasers