Briefly examine aerodynamic object (6)
I believe the answer is:
discus
'aerodynamic object' is the definition.
(object thrown through the air)
'briefly examine' is the wordplay.
'briefly' means to remove the last letter.
'examine' becomes 'discuss'.
'discuss' with its last letter taken off is 'DISCUS'.
(Other definitions for discus that I've seen before include "Something thrown by athletes" , "Throwing plate" , "Athlete's projectile" , "It is thrown in athletic events" , "Round object thrown in sport" .)