Crossword Genius

Structure with keystone (4)

Ross

I believe the answer is:

arch

I believe this clue is a double definition.

'structure' is the first definition.
(arch is a kind of structure)

'keystone' is the second definition.
(thesaurus)

'with' acts as a link.

(Other definitions for arch that I've seen before include "in short, is out of date" , "Masonry structure for spanning an opening" , "Masonry construction for spanning an opening" , "Knowing, coy" , "Instep of foot" .)

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.