Embellished or terribly neat (6)
I believe the answer is:
'embellished' is the definition.
'or terribly neat' is the wordplay.
'terribly' indicates anagramming the letters.
'neat' with letters rearranged gives 'nate'.
(Other definitions for ornate that I've seen before include "Decorated with tan ore" , "Heavily decorated" , "Much-decorated" , "Baroque" , "Elaborately decorated, perhaps overdone" .)