Proclamation of intended marriage (5)
I believe the answer is:
banns
'proclamation of intended marriage' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for banns that I've seen before include "Notice of marriage read in church" , "Notice of a wedding" , "Notices of marriage" , "Public announcement read in church of forthcoming marriage" , "Pre-wedding notice" .)