The standard (3)
I believe the answer is:
par
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the standard</span>' is the definition.<br/ ><span class="explanation-format__explanation">(standard of play in golf)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for par that I've seen before include "Normal golfing score" , "Standard number of strokes for a golf hole" , "Standard score for golfers" , "average degree" , "Black music" .)