Peninsula in Russian region son overlooked (6)

I believe the answer is:

iberia

I'm a little stuck... Click here to teach me more about this clue!

'peninsula' is the definition.
(Iberia is an example)

I can't explain the rest of the clue.

(Other definitions for iberia that I've seen before include "European region" , "W. European peninsula" , "Where Juan possibly lives" , "Mediterranean peninsula" , "Spain and Portugal - airline" .)

I've seen this clue in The Times.

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.