Means of establishing who is present (4,4)
I believe the answer is:
roll call
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">means of establishing who is present</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 roll call that I've seen before include "Register presence" , "Reading of list of names to establish attendance" , "Method of checking who's present" , "Means of establishing who is present" , "Reading out names to verify presence" .)