Related Clues:
- Air beyond the clouds
- Inhaled anesthetic of old
- __ alcohol
- Fifth classical element
- Onetime dental anesthetic
- One on it may be out of it
- Clear blue sky
- ___ alcohol (very strong drink)
- __ acetate: paint solvent
- Operating room substance, once
- A real knockout?
- Anesthetic of yore
- Knockout stuff
- Rarefied air
- Early anesthesia