Crossword Genius

Anaesthetic; air (5)

Ross

I believe the answer is:

ether

I believe this clue is a double definition.

'anaesthetic' is the first definition.
(ether is a kind of anaesthetic)

'air' is the second definition.
(literary term for the air or sky)

(Other definitions for ether that I've seen before include "Imaginary interstellar medium" , "Liquid used as anaesthetic/ solvent" , "Clear upper air" , "Some were put out by this" , "Colourless volatile highly inflammable liquid" .)

I've seen this clue in The Telegraph.
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