Point above large church somewhere in central London (11)
I believe the answer is:
westminster
'somewhere in central london' is the definition.
(area of Central London)
'point above large church' is the wordplay.
'point' becomes 'west' (west is a kind of point).
'above' is a charade indicator (letters next to each other).
'large church' becomes 'minster' (I've seen this before).
'west'+'minster'='WESTMINSTER'
(Other definitions for westminster that I've seen before include "public school" , "Houses of Parliament borough" , "London borough - abbey - parliament" , "London borough and cathedral" , "(Seat of) Parliament" .)