Crossword Genius

Attack (6)

Ross

'attack' is the definition.
(archaic term for a military attack)

This is all the clue.

(Other definitions for onset that I've seen before include "Outbreak" , "Kick-off" , "Stone (anag)" , "Beginning; violent attack" , "Beginning (of disease etc)" .)

I've seen this clue in The Mirror, the Evening Standard, The Times, the King Feature Syndicate and The Guardian.
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