Police baton (9)
I believe the answer is:
truncheon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">police baton</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for truncheon that I've seen before include "Peelers' baton" , "Policeman's traditional weapon" , "Police staff" , "Police baton" , "Cosh" .)