Clerical author, reportedly? (8)
I believe the answer is:
priestly
'clerical' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for priestly that I've seen before include "Ecclesiastical" , "Like a minister" , "Hieratic" , "just like a cleric" , "Pious" .)