City formerly called Constantinople (8)

I believe the answer is:

istanbul

(Other definitions for istanbul that I've seen before include "City of Turkey" , "foreign city" , "Modern Byzantium" , "Nail bust in the Turkish city" , "Stub nail in Turkey" .)

I've seen this clue in The Telegraph.

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.