Related Clues:
- Onetime dental anesthetic
- One on it may be out of it
- Clear blue sky
- Operating room substance, once
- A real knockout?
- Anesthetic of yore
- Knockout stuff
- Rarefied air
- Early anesthesia
- Certain anesthetic
- Flammable anesthetic
- Walt Disney creation
- Old knockout cause
- Disney mouse
- Preoperative anesthetic of old