Bygone airline (3)

I think it could be either:

Which length description are you looking for?:

twa

'bygone airline' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for twa that I've seen before include "A couple of Scotsmen" , "a couple in Edinburgh" , "Organisation that used to provide flight" , "pygmy" , "pygmies" .)

I've seen this clue in the LA Times and The Wall Street Journal.

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.