Crossword Genius

An ancient Greek is charged with negativity (7)

Ross

I believe the answer is:

anionic

'charged with negativity' is the definition.
(relating to anions, which have negative charge)

'an ancient greek' is the wordplay.
'ancient greek' becomes 'Ionic' (Ionic is an example).
'an'+'ionic'='ANIONIC'

'is' acts as a link.

I've seen this clue in The Guardian.
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