Crossword Genius

Element of unusual ringtone (8)

Ross

I believe the answer is:

nitrogen

'element' is the definition.
(nitrogen is a kind of element)

'unusual ringtone' is the wordplay.
'unusual' indicates an anagram.
'ringtone' anagrammed gives 'NITROGEN'.

'of' acts as a link.

(Other definitions for nitrogen that I've seen before include "creates much atmosphere" , "Major constituent of air" , "It forms the greater part of air" , "It's a gas, the strange ringtone" , "Main element of air" .)

I've seen this clue in The Telegraph.
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