Runner's goal (4)
I believe the answer is:
tape
'runner's goal' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tape that I've seen before include "Strip of material (that might be red!)" , "The winning runner breasts the ...." , "that race winner may break" , "Adhesive strip; record" , "Common medium for recording" .)