Wartime naval base in the Orkney Islands (5,4)

I believe the answer is:

scapa flow

(Other definitions for scapa flow that I've seen before include "harbour" , "Wartime naval base in Orkney" , "Landlocked anchorage in the Orkney Islands" , "Former naval base in the Orkney Islands" .)

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