Riot queller
I believe the answer is:
mace
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">riot queller</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for mace that I've seen before include "Ceremonial staff or kind of spice" , "Tear gas - spice" , "Spice; ceremonial baton" , "Staff of office and a spice" , "Spice; heavy club" .)