Creole composition about Georgia's top artist (2,5)
I believe the answer is:
el greco
'artist' is the definition.
(I've seen this before)
'creole composition about georgia's top' is the wordplay.
'composition' indicates anagramming the letters.
'about' is an insertion indicator.
'top' says to take the initial letters.
The first letter of 'georgia' is 'g'.
'creole' anagrammed gives 'elreco'.
'elreco' going around 'g' is 'EL GRECO'.
(Other definitions for el greco that I've seen before include "Crete-born Sp. painter" , "Cretan-born Spanish painter, d. 1614" , "Spanish painter, nicknamed for his place of birth" , "Spanish artist born in Crete" , "He painted" .)