Exclude society girl meeting a queen (5)
I believe the answer is:
debar
'exclude' is the definition.
('debar' can be a synonym of 'exclude')
'society girl meeting a queen' is the wordplay.
'society girl' becomes 'deb' (I've seen this before).
'meeting' is a charade indicator (letters next to each other).
'queen' becomes 'r' (r is abbreviation regina. e.g. in ER ).
'deb'+'a'+'r'='DEBAR'
(Other definitions for debar that I've seen before include "Ban" , "Exclude from a place" , "Blackball" , "Exclude - bread (anag)" , "Shut out, preclude" .)