Improved religious education for myself and daughter (8)
I believe the answer is:
reformed
'improved' is the definition.
(reforming is a kind of improving)
'religious education for myself and daughter' is the wordplay.
'religious education' becomes 'RE' (abbreviation).
'myself' becomes 'me'.
'and' is a charade indicator (letters next to each other).
'daughter' becomes 'd' (genealogical abbreviation).
're'+'for'+'me'+'d'='REFORMED'
(Other definitions for reformed that I've seen before include "Restored - mended one's ways" , "sort of church" , "Changed for the better" .)