Maybe prelate’s morning so organised (9)
I believe the answer is:
monsignor
'maybe prelate's' is the definition.
(a prelate might be addressed as 'monsignor')
'morning so organised' is the wordplay.
'organised' indicates anagramming the letters.
'morning'+'so'='morningso'
'morningso' with letters rearranged gives 'MONSIGNOR'.
(Other definitions for monsignor that I've seen before include "Religious title" , "Title of certain Catholic priests and officials" , "Clergyman" , "High-ranking RC priest" , "What one may call priest" .)