A cop is excited about southern artist (7)
I believe the answer is:
picasso
'artist' is the definition.
(Picasso is an example)
'a cop is excited about southern' is the wordplay.
'excited' is an anagram indicator.
'about' is an insertion indicator.
'southern' becomes 's' (abbreviation).
'a'+'cop'+'is'='acopis'
'acopis' is an anagram of 'picaso'.
'picaso' enclosing 's' is 'PICASSO'.
(Other definitions for picasso that I've seen before include "Cubist artist" , "20th century painter" , "So aspic is out for the Spanish artist" , "famous artist" , "Spanish painter and sculptor" .)