Proper ceremony announced (5)
I believe the answer is:
right
'proper' is the definition.
('right' is associated in meaning with 'proper')
'ceremony announced' is the wordplay.
'ceremony' becomes 'rite' (rite is a kind of ceremony).
'announced' indicates a 'sounds like' (homophone) clue.
'rite' sounds like 'RIGHT'.
(Other definitions for right that I've seen before include "Most favourable" , "Valid" , "The Tory side" , "Girth (anag)" , "Just - correct - title" .)