Galaxy guardians (4)

I believe the answer is:

jedi

(Other definitions for jedi that I've seen before include "Film: 'Return of the --'" , "Forceful knight" , "Star Wars warrior" , "Star Wars knight" , "Legendary crimebusters" .)

I've seen this clue in the Newsday.

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.