Profusion of bakery product served during a social (9)
I believe the answer is:
abundance
'profusion' is the definition.
(thesaurus)
'bakery product served during a social' is the wordplay.
'bakery product' becomes 'bun'.
'served during' indicates putting letters inside.
'social' becomes 'dance' (I've seen this before).
'a'+'dance'='adance'
'bun' going within 'adance' is 'ABUNDANCE'.
'of' is the link.
(Other definitions for abundance that I've seen before include "call at whist" , "Ban due can be plenty" , "fullness" , "Weallth, profusion" , "Plenitude" .)