Western ceremony put down (5)
I believe the answer is:
write
'put down' is the definition.
(I've seen this in another clue)
'western ceremony' is the wordplay.
'western' becomes 'w'.
'ceremony' becomes 'rite' (rite is a kind of ceremony).
'w'+'rite'='WRITE'
(Other definitions for write that I've seen before include "Inscribe" , "Create (manuscript)" , "Compose (music)" , "Compose (a text)" , "Draft" .)