A stage between flights (7)
I believe the answer is:
landing
I believe this clue is a double definition.
'a stage' is the first definition.
(thesaurus)
'between flights' is the second definition.
(I've seen this before)
(Other definitions for landing that I've seen before include "Level space near staircase" , "somewhere between flights" , "Touchdown" , "Alighting point" , "Going to ground" .)