Symbolic barrier named by Winston Churchill (4,7)

I believe the answer is:

iron curtain

(Other definitions for iron curtain that I've seen before include "Notional barrier between East and West" , "former division in Europe" , "Former barrier across Europe" , "severe barrier to communication" , "Notional C 20 barrier across Europe" .)

I've seen this clue in The Times and The Sunday 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.