Part of a liberal mindset upset group over time with Northern church (9)
I believe the answer is:
tolerance
'part of a liberal mindset upset' is the definition.
I can't judge whether this defines the answer.
'group over time with northern church' is the wordplay.
'group over' becomes 'tol' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'time' becomes 'era' (era is a kind of time).
'with' means one lot of letters go next to another.
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'church' becomes 'CE' (abbreviation for Church of England).
'tol'+'era'+'n'+'ce'='TOLERANCE'
Can you help me to learn more?
(Other definitions for tolerance that I've seen before include "Allowable variation (in size)" , "Willingness to accept the beliefs of others" , "See 10" , "resignation" , "Ability to resist pain" .)