Marriage ceremony (7)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
wedding
'marriage ceremony' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for wedding that I've seen before include "following 28 [SILVER]" , "Marriage ceremony" , "Celebration of marriage" , "Audience for the 13 14" , "Nuptials" .)