Discussion medium (5)
I believe the answer is:
forum
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">discussion medium</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for forum that I've seen before include "Roman meeting place" , "place for debate" , "Online message board" , "Meeting of people for discussion" , "Place to meet people" .)