Light mail item (3,6)
I believe the answer is:
air letter
(Other definitions for air letter that I've seen before include "Item of overseas post" , "Item of overseas mail" , "speedy delivery" .)
I've seen this clue in The 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.