Plotters regularly use such weapons (4)

I believe the answer is:

axes

This clue is a double definition.

'plotters regularly use such' is the first definition.
(axes on a graph)

'weapons' is the second definition.

(Other definitions for axes that I've seen before include "Chopping tools" , "equipment for lumberjack" , "Main graph lines" , "Tools with heavy bladed heads" , "Hatchets" .)

I've seen this clue in The Guardian.

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