Crossword Genius

Neon or xenon (3)

Ross

I believe the answer is:

gas

I believe this is a double definition.

'neon' is the first definition.
(I've seen this in another clue)

'xenon' is the second definition.
(thesaurus)

(Other definitions for gas that I've seen before include "natural resource" , "Hydrogen, for example" , "Domestic fuel" , "In brief, American petrol" , "idle chit-chat" .)

I've seen this clue in the LA Times and The New York Times.
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