Put down as a ceremony with point (5)
I believe the answer is:
write
'put down' is the definition.
(I've seen this in another clue)
'a ceremony with point' is the wordplay.
'a ceremony' becomes 'rite' (rite is a kind of ceremony).
'with' says to put letters next to each other.
'point' becomes 'w' (W is an example).
'rite' put after 'w' is 'WRITE'.
'as' acts as a link.
(Other definitions for write that I've seen before include "Create (manuscript)" , "Compose (music)" , "Put down in black and white" , "Put pen to paper" , "what an author must do" .)