Quiet, unusually dear sky pilot (5)
I believe the answer is:
padre
'sky pilot' is the definition.
('padre' can be a synonym of 'sky pilot')
'quiet unusually dear' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano'**).
'unusually' is an anagram indicator.
'dear' is an anagram of 'adre'.
'p'+'adre'='PADRE'
(Other definitions for padre that I've seen before include "Father" , "Services' chaplain" , "Minister" , "Priest, chaplain" , "A military clergyman" .)