Religious education — and saint's observations (7)
I believe the answer is:
remarks
'observations' is the definition.
('remark' can be a synonym of 'observation')
'religious education and saint's' is the wordplay.
'religious education' becomes 'RE' (abbreviation).
'and' is a charade indicator (letters next to each other).
'saint's' becomes 'marks' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
're'+'marks'='REMARKS'
Can you help me to learn more?
(Other definitions for remarks that I've seen before include "See 14" , "Comments, observations" .)