Old postal choice (7)

I believe the answer is:

airmail

(Other definitions for airmail that I've seen before include "Speedy deliveries" , "Letters carried by plane" , "Letters taken by plane" , "Letters sent up" , "Flying post?" .)

I've seen this clue in the King Feature Syndicate.

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.