Large gathering of people (6)
I believe the answer is:
throng
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large gathering of people</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for throng that I've seen before include "Large gathering of people" , "Troop" , "A large crowd of people" , "Large numbers" , "Mob" .)