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Gas one converted, nitrogen (4)

Ross

I believe the answer is:

neon

'nitrogen' is the definition.
(thesaurus)

'gas one converted' is the wordplay.
'gas' becomes 'N' (chemical symbol for nitrogen).
'converted' indicates an anagram.
'one' with letters rearranged gives 'eon'.
'n'+'eon'='NEON'

(Other definitions for neon that I've seen before include "Type of lighting" , "None (anag.)" , "One of the six inert gasses" , "It may illuminate" , "Colourless gas, used in lighting" .)

I've seen this clue in The Telegraph.
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