An ancient geographical region south of the Caucasus Mountains, roughly corresponding to present-day Georgia (6)

I believe the answer is:

iberia

(Other definitions for iberia that I've seen before include "old part of Europe" , "European territory" , "W. European peninsula" , "Peninsula encompasing Spain and Protugal" , "Great European peninsula containing Spain and Portugal" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.