Parts of course of airway staff only partly required (8)
I believe the answer is:
fairways
'parts of course' is the definition.
(golf course)
'of airway staff only partly required' is the wordplay.
'only partly required' indicates a hidden word.
'FAIRWAYS' is hidden in the letters of 'of airway staff'.
(Other definitions for fairways that I've seen before include "A golfer drives down these spaces" , "Golfers drive the ball down these" , "Areas between tees and greens" , "Grassy strips between tee and green" .)