Lined up (6)
I believe the answer is:
queued
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lined up</span>' is the definition.<br/ ><span class="explanation-format__explanation">('queue' can be a synonym of 'line up')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for queued that I've seen before include "Joined line to wait for sevices" , "Stood in line to get in" , "Lined up" , "Waited in line" .)