Eg, London society — not so English (4)
I believe the answer is:
city
'eg london' is the definition.
(london is a kind of city)
'society not so english' is the wordplay.
'society' becomes 'soc' (abbreviation in the names of organisations).
'not' is a deletion indicator.
'english' becomes 'ity' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'soc' with 'so' removed is 'c'.
'c'+'ity'='CITY'
Can you help me to learn more?
(Other definitions for city that I've seen before include "See 5" , "- of God (St Augustine)" , "See 10" , "See 9" , "Charlotte, for instance" .)