Church council (5)
I believe the answer is:
synod
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">church council</span>' is the definition.<br/ ><span class="explanation-format__explanation">(type of church assembly)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for synod that I've seen before include "Ecclesiastic council" , "Ecclesiastical gathering" , "Ecumenical council" , "Council of bishops" , "council meeting" .)