Secret meeting (8)
I believe the answer is:
conclave
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">secret meeting</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for conclave that I've seen before include "Group meeting (to choose a pope?)" , "Papal election meeting" , "Private meeting (to elect a pope?)" , "An assembly of cardinals to elect pope" , "Confidential or secret meeting" .)