Crossword Genius

Early anesthetic (5)

Ross

I believe the answer is:

ether

'early anesthetic' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for ether that I've seen before include "Liquid used as anaesthetic/ solvent" , "Some were put out by this" , "number" , "I'm volatile" , "Imaginary interstellar medium" .)

I've seen this clue in the Penny Press and the LA Times.
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