Radius or ulna (4)

I think it could be either:

Which length description are you looking for?:

bone

This clue is a double definition.

'radius' is the first definition.
(radius is an example)

'ulna' is the second definition.
(thesaurus)

(Other definitions for bone that I've seen before include "#Close to it is risque" , "How dry" , "See 6" , "Part of skeleton" , "Eg, radius or stirrup" .)

I've seen this clue in The Washington Post, the USA Today and the King Feature Syndicate.

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.