Crossword Genius

Someone who causes malicious injury in order to undermine (8)

Ross

I believe the answer is:

saboteur

(Other definitions for saboteur that I've seen before include "One who deliberately subverts" , "Our beats (anag) - fifth columnist" , "One causing deliberate destruction" , "Abort use (anag)" , "One engaged in malicious disruption" .)

I've seen this clue in the Sydney Morning Herald.
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