Military detachment (4)
I believe the answer is:
unit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">military detachment</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 unit that I've seen before include "Self-contained part" , "Single item, maybe part of a set" , "Subdivision of a military group" , "Subdivision of a whole" , "Body of soldiers" .)