Record description (3-4)
I believe the answer is:
all-time
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">record description</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for all-time that I've seen before include "Unsurpassed to date" , "As yet unsurpassed" , "So far unsurpassed" , "Best ever" , "Hitherto unsurpassed" .)