Call together (6)
I believe the answer is:
summon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">call together</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for summon that I've seen before include "Order to come" , "Call to attend on an official matter" , "Command to come - to court?" , "Convene" , "Call (someone) to attend" .)