Volleyball player races into spectator (6)
I believe the answer is:
setter
'volleyball player' is the definition.
(I've seen this in another clue)
'races into spectator' is the wordplay.
'races' becomes 'tt' (Isle of Man Tourist Trophy races).
'into' indicates putting letters inside.
'spectator' becomes 'seer' (someone seeing or spectating).
'tt' going within 'seer' is 'SETTER'.
(Other definitions for setter that I've seen before include "One barking" , "Late evening sun is a" , "Dog trained to point at game" , "Dog found in street" , "Breed of gun dog" .)