Put down as a Western ceremony (5)
I believe the answer is:
write
'put down' is the definition.
(thesaurus)
'a western ceremony' is the wordplay.
'a western' becomes 'w'.
'ceremony' becomes 'rite' (rite is a kind of ceremony).
'w'+'rite'='WRITE'
'as' is the link.
(Other definitions for write that I've seen before include "Compose (a text)" , "Draft" , "Inscribe" , "Produce text" , "Compose (music)" .)