Lack of knowledge of good woman visiting fashionable church (9)
I believe the answer is:
ignorance
'lack of knowledge' is the definition.
(I've seen this before)
'good woman visiting fashionable church' is the wordplay.
'good' becomes 'g' (abbreviation).
'woman' becomes 'nora' (woman's name).
'visiting' indicates putting letters inside.
'fashionable' becomes 'in' (in can mean fashionable or trendy).
'church' becomes 'CE' (Church of England).
'g'+'nora'='gnora'
'gnora' put inside 'in' is 'ignoran'.
'ignoran'+'ce'='IGNORANCE'
'of' is the link.
(Other definitions for ignorance that I've seen before include "Bliss perhaps" , "Lack of education" , "Possibly bliss?" , "bliss, they say" , "in all innocence" .)