Telling people a bishop is visiting (9)
I believe the answer is:
narration
'telling' is the definition.
(I've seen this before)
'people a bishop is visiting' is the wordplay.
'people' becomes 'nation' ().
'bishop' becomes 'rr' (abbreviation for Right Reverend).
'is visiting' means one lot of letters goes inside another.
'a'+'rr'='arr'
'nation' placed around 'arr' is 'NARRATION'.
(Other definitions for narration that I've seen before include "Voice-over in film" , "Account of events" , "telling" , "Process of storytelling" , "Story" .)