Address of adviser monsignor includes (6)
I believe the answer is:
sermon
'address' is the definition.
(I know that sermon is a type of address)
'of adviser monsignor includes' is the wordplay.
'of' indicates the answer is hidden within the clue.
'SERMON' is hidden within 'adviser monsignor includes'.
(Other definitions for sermon that I've seen before include "Homily" , "Lecture from a pulpit" , "Moral lecture" , "Lesson or religious talk" , "Preachment" .)