Crossword Genius

May be burning to talk! (3)

Ross

I believe the answer is:

gas

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'talk' is the definition.
(thesaurus)

I don't understand the remainder of the clue.

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(Other definitions for gas that I've seen before include "See 2" , "Oxygen is one" , "16 (US)" , "Something exciting" , "American fuel" .)

I've seen this clue in the Evening Standard.
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