Citizen army (7)
I believe the answer is:
militia
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">citizen army</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 militia that I've seen before include "Citizens army" , "Armed body" , "Citizen army" , "Civilians trained as soldiers but not part of the regular army" , "Reservists" .)