Flight late, so car must be arranged (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')
'late so car must be arranged' is the wordplay.
'must be arranged' indicates anagramming the letters.
'late'+'so'+'car'='latesocar'
'latesocar' with letters rearranged gives 'ESCALATOR'.
(Other definitions for escalator that I've seen before include "Mechanised staircase" , "financial clause" , "Moving stairway" , "Moving staircase" , "Carol eats (anag.)" .)