Bit of waiting at Enschede Airport barrier (4)
I believe the answer is:
gate
'barrier' is the definition.
(I know that gate is a type of movable barrier)
'bit of waiting at enschede airport' is the wordplay.
'bit of' says the answer is hidden in the clue.
'GATE' can be found hidden inside 'waiting at enschede airport'.
(Other definitions for gate that I've seen before include "Number attending" , "Opening in a wall or fence" , "It may be barred" , "Doorway" , "Total of spectators" .)