Admission of charm (8)
I believe the answer is:
entrance
I believe this is a double definition.
'admission' is the first definition.
(thesaurus)
'charm' is the second definition.
('entrance' can be a synonym of 'charm')
'of' acts as a link.
(Other definitions for entrance that I've seen before include "Way in - fascinate" , "Send" , "doorway" , "drawbridge?" , "Bowl over" .)