Assemble, as troops (6)
I believe the answer is:
muster
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">assemble as troops</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for muster that I've seen before include "assembled troops?" , "Set rum badly for the calling together of the troops" , "Bring (troops) together" , "a lot of peacocks" , "marshal" .)