A matter of course? (3)
I believe the answer is:
par
'a matter of course?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for par that I've seen before include "A number of golfing" , "Standard number of strokes for a golf hole" , "Average standard" , "State of equality" , "Face value; equal standing" .)