Incendiarism (5)

I believe the answer is:

arson

'incendiarism' is the definition.
(synonyms)

This is all the clue.

(Other definitions for arson that I've seen before include "Illegally firing" , "Crime of fire setting" , "Criminal pyromania" , "Torching" , "Fire-lighting crime" .)

I've seen this clue in The Guardian, The Times, the Sydney Morning Herald, The Telegraph and The Sunday Times.

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