Airborne youth leader gets cast out (6)
I believe the answer is:
flying
'airborne' is the definition.
(I've seen this before)
'youth leader gets cast out' is the wordplay.
'youth leader' becomes 'y' (I've seen this in other clues).
'gets' is an insertion indicator.
'cast out' becomes 'fling' (synonyms).
'y' placed into 'fling' is 'FLYING'.
(Other definitions for flying that I've seen before include "Airborne" , "-- Squad; -- doctor" , "Taking to the air" , "Going by air" , "The 22 23 show" .)