Place to say "I do" (5)
I believe the answer is:
altar
'place to say i do' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for altar that I've seen before include "Table used for the mass or eucharist" , "place of unions" , "Place of worship" , "Table for religious sacrifices or ceremonies" , "section of church" .)