High-flier who predates good result for part of course (5)
I believe the answer is:
eagle
This clue is a double definition.
'high-flier who predates' is the first definition.
(predate can mean to act as a predator)
'good result for part of course' is the second definition.
(eagle is a type of score on a golf course)
(Other definitions for eagle that I've seen before include "Valuable piece" , "Keen-eyed bird" , "might one be bald?" , "Avian symbol of power" , "five buck bit, or more" .)