City nicknamed "The Heart of Georgia” (5)
I believe the answer is:
macon
'city nicknamed the heart of georgia' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for macon that I've seen before include "red" , "French wine region" , "Dry white Burgundy wine" , "Drink" , "Burgundian wine" .)