Father’s a sky pilot! (5)
I believe the answer is:
padre
I believe this is a double definition.
'father's' is the first definition.
('Padre' can be a synonym of 'father')
'a sky pilot' is the second definition.
('padre' can be a synonym of 'sky pilot')
(Other definitions for padre that I've seen before include "Chaplain to armed forces" , "Father" , "Minister" , "clerical worker" , "Cleric" .)