Directions for conducting Christian services (6)
I believe the answer is:
rubric
'directions for conducting christian services' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for rubric that I've seen before include "Service-conduct instruction" , "Words put as a heading or direction as to how something must be done" , "Authoritative rule of procedure" , "Ruddy" , "set of instructions" .)