Fast plane (3)

I think it could be either:

Which length description are you looking for?:

sst

'fast plane' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for jet that I've seen before include "Type of plane" , "flies fast" , "Glossy black colour" , "Hard black mineral used as gem" , "Jumbo plane?" .)

I've seen this clue in the LA Times, the USA Today, The Mirror and 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.