Direct pickup truck to part of airport (7,5)
I believe the answer is:
control tower
'to part of airport' is the definition.
('control tower' is part of 'airport')
'direct pickup truck' is the wordplay.
'direct' becomes 'control' (I've seen this in another clue).
'pickup truck' becomes 'tower' (I can't justify this - if you can you should believe this answer much more).
'control'+'tower'='CONTROL TOWER'
Can you help me to learn more?
(Other definitions for control tower that I've seen before include "Airport command point" , "Airport's command centre" , "where landing can be supervised" , "Airport command hub" , "Airport centre" .)