Crossword Genius

Citadel without key or lock (5)

Ross

I believe the answer is:

tress

'lock' is the definition.
(both can mean a piece of hair)

I can't explain the rest of the clue.

(Other definitions for tress that I've seen before include "Switch" , "Obsolete support" , "Bit of hair" , "Long lock or plait of hair" , "Rests (anag.)" .)

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.