Of the region in south-eastern France (9)
I believe the answer is:
provencal
'of the region in south-eastern france' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for provencal that I've seen before include "French region" , "dialect" , "of Langue d'oc" , "Language in France" , "of southern France" .)