Sea of Serenity's locale (4)

I believe the answer is:

moon

(Other definitions for moon that I've seen before include "who headed a religious 29 [CULT]" , "Where Armstrong stood" , "Expose one's buttocks" , "Heavenly body < exemplified in Titania?" , "Idle (around) - satellite" .)

I've seen this clue in the Universal.

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.