Shared point in writing about international body provided by Liberal (8)
I believe the answer is:
communal
'shared' is the definition.
(I've seen this before)
'point in writing about international body provided by liberal' is the wordplay.
'point in writing' becomes 'comma'.
'about' is an insertion indicator.
'international body' becomes 'un'.
'provided by' is a charade indicator (letters next to each other).
'liberal' becomes 'l' (abbreviation).
'comma' enclosing 'un' is 'communa'.
'communa'+'l'='COMMUNAL'
(Other definitions for communal that I've seen before include "Owned in common" , "Shared by a group" , "Available to all locally" , "Involving sharing of work and property" , "For all to use" .)