Record that's broken at end of race (4)
I believe the answer is:
tape
This clue is a double definition.
'record' is the first definition.
(taping record is a kind of recording)
'that's broken at end of race' is the second definition.
(the winner of a race runs through tape)
(Other definitions for tape that I've seen before include "Adhesive --; red --" , "Record - broken by the winner" , "that race winner may break" , "Binder" , "Record; finishing line" .)