Out-of-this-world outfit (9)

I believe the answer is:

spacesuit

(Other definitions for spacesuit that I've seen before include "- "heavenly" outfit here?" , "out-of- this-world costume?" , "Astronaut clothing" , "Bulky clothing" , "Astronaut's clothing" .)

I've seen this clue in The New York 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.