Marriage ceremony (7)
I believe the answer is:
wedding
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">marriage ceremony</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 wedding that I've seen before include "following 28 [SILVER]" , "Marriage ceremony" , "Celebration of marriage" , "Audience for the 13 14" , "Nuptials" .)