King entering a social event, accomplished and charming (8)
I believe the answer is:
adorable
'charming' is the definition.
(thesaurus)
'king entering a social event accomplished' is the wordplay.
'king' becomes 'r' (r is abbreviation for rex).
'entering' is an insertion indicator.
'social event' becomes 'do' (do is a kind of social event).
'accomplished' becomes 'able' (I've seen this before).
'a'+'do'+'able'='adoable'
'r' going into 'adoable' is 'ADORABLE'.
'and' acts as a link.
(Other definitions for adorable that I've seen before include "Evoking love and admiration" , "Very pleasing" , "Inspiring great affection" , "fetching" , "Quite delightful, fit to be worshipped" .)