Nickname for a destructive fellow? (6)

I believe the answer is:

buster

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'fellow?' is the definition.
(I know that fellow can be written as buster)

I can't explain the remainder of the clue.

(Other definitions for buster that I've seen before include "-- Keaton, comic actor" , "Keaton or Crabbe" , "- - Keaton, silent star" , "Form of address to man" , "-- Keaton, US silent film actor" .)

I've seen this clue in the Evening Standard.

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