A spice, a bludgeon or a type of tear gas? (4)

I believe the answer is:

mace

(Other definitions for mace that I've seen before include "something fragrant" , "Medieval weapon or kind of spice" , "Spice; heavy club" , "Spice; ceremonial baton" , "Staff of office and a spice" .)

I've seen this clue in The Guardian.

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