Course number (3)
I believe the answer is:
par
'course number?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for par that I've seen before include "Average - equality" , "Rating of strokes required for hole (golf)" , "What is normal - . . . for the course" , "Face value; equal standing" , "Average or normal score" .)