Crossword Genius

Post office inquiry (6)

Ross

I believe the answer is:

tracer

(Other definitions for tracer that I've seen before include "One finding" , "trail of light" , "This bullet leaves smoke in its passage" , "Missile" , "He's managed to find" .)

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.