Civilian army bombed central barricade in revolutionary mission (7)

I believe the answer is:

militia

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'civilian army' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for militia that I've seen before include "Reservists" , "Civilian army force" , "Citizen army" , "Army of non-professional soldiers" , "Home Guard" .)

I've seen this clue in The Hindu.

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