Serve in revised matins in elevated religious state (8)
I believe the answer is:
saintdom
'elevated religious state' is the definition.
The definition suggests a singular noun which matches the answer.
'serve in revised matins' is the wordplay.
'serve' becomes 'do' (synonyms).
'in' means one lot of letters goes inside another.
'revised' indicates anagramming the letters.
'matins' with letters rearranged gives 'saintm'.
'do' put within 'saintm' is 'SAINTDOM'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for saintdom that I've seen before include "Great holiness" , "Canonised persons collectively" , "attained by my aunt, perhaps" , "Lofty station" , "exalted status" .)