Police force (12)
I believe the answer is:
constabulary
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">police force</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for constabulary that I've seen before include "Police force or station" , "14 6 or 2" .)