Crossword Genius

Most edgy – isn't ever relaxed (8)

Ross

I believe the answer is:

nerviest

'most edgy' is the definition.
('nervy' can be a synonym of 'edgy')

'isn't ever relaxed' is the wordplay.
'relaxed' indicates anagramming the letters.
'isnt'+'ever'='isntever'
'isntever' anagrammed gives 'NERVIEST'.

I've seen this clue in The Guardian.
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