Superb pilot with Spitfire initially breezes through? (4)
I believe the answer is:
aces
'breezes through?' is the definition.
('ace' can be a synonym of 'breeze through')
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for aces that I've seen before include "holes in one" , "Tennis serves the receiver can't reach" , "Winning serves" , "They're high and low on cards" , "never come back" .)