He does things in religiously correct order (6)
I believe the answer is:
rector
'he does' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'in religiously correct order' is the wordplay.
'in' indicates the answer is hidden within the clue.
'RECTOR' can be found hidden inside 'religiously correct order'.
'things' is the link.
Can you help me to learn more?
(Other definitions for rector that I've seen before include "Parish clergyman" , "Cleric" , "Church official" , "Churchman" , "Minister of religion" .)