Good woman in fashionable church: a blissful state for some (9)
I believe the answer is:
ignorance
'a blissful state for some' is the definition.
(ignorance is bliss)
'good woman in fashionable church' is the wordplay.
'good' becomes 'g' (abbreviation).
'woman' becomes 'nora' (woman's name).
'in' indicates putting letters inside.
'fashionable' becomes 'in' (in can mean fashionable or trendy).
'church' becomes 'CE' (abbreviation for Church of England).
'g'+'nora'='gnora'
'gnora' going into 'in' is 'ignoran'.
'ignoran'+'ce'='IGNORANCE'
(Other definitions for ignorance that I've seen before include "'Where . . . . . . . . . is bliss, 'tis folly to be wise'" , "Nescience" , "Groin acne (anag.)" , "State of unknowing" , "in all innocence" .)