Large group on the move (5)
I believe the answer is:
horde
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large group on the move</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 horde that I've seen before include "Throng, mass" , "Large crowd" , "A mob of people" , "A moving crowd" , "Vast multitude" .)