Element used in cryosurgery (5)

I believe the answer is:

argon

(Other definitions for argon that I've seen before include "something inert and insubstantial" , "Gas, inert constituent of air" , "Gas, 1% of atmosphere" , "elementary" , "noble element" .)

I've seen this clue in The Washington Post.

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.