Airport pavement (6)
I believe the answer is:
tarmac
'airport pavement' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tarmac that I've seen before include "Surfaced area as for planes to take off and land" , "Topping" , "black one" , "Surfaced area for plane to land" , "short runway, perhaps" .)