Happening very fast and unexpectedly (9)

I believe the answer is:

whirlwind

(Other definitions for whirlwind that I've seen before include "(Of a romance) rapidly sweeping you off your feet?" , "kind of romance?" , "Mass of air in violent spiral motion" , "E.g. a dust devil" , "Energetic person" .)

I've seen this clue in The Guardian.

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