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Fires and tries to kill leader (4)

Ross

I believe the answer is:

axes

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

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for axes that I've seen before include "Edge tools with metal heads" , "Tools with heavy-bladed heads" , "Chopping tools" , "Drastically cuts" , "equipment for lumberjack" .)

I've seen this clue in The Hindu.
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