Pilot’s tool (5)

I believe the answer is:

radar

(Other definitions for radar that I've seen before include "System for locating distant objects" , "Electronic detection system" , "Aircraft detection system" , "waves to expose foe" , "Electronic rangefinder" .)

I've seen this clue in The Mirror.

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.