Non-stop flight? (9)
I believe the answer is:
escalator
'flight?' is the definition.
(I have seen 'nonstop flight' mean 'escalator' so perhaps 'flight' could also mean 'escalator')
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for escalator that I've seen before include "it moves up and down" , "Mechanised staircase" , "Moving staircase" , "Moving stairway" , "Carol eats (anag.)" .)