Line of people (5)
I believe the answer is:
queue
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">line of people</span>' is the definition.<br/ ><span class="explanation-format__explanation">(people queuing up)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for queue that I've seen before include "Stand in line" , "Line of waiters" , "Pigtail; column" , "Pigtail; get in line" , "(Usually) orderly line" .)