Sprinter's goal (4)
I believe the answer is:
tape
'sprinter's goal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tape that I've seen before include "String to be broken at end of a race" , "Record; cassette" , "that may be red" , "that race winner may break" , "broken by fastest runner" .)