Numerical fact (9)
I believe the answer is:
statistic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">numerical fact</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for statistic that I've seen before include "Piece of data" , "One single item of data" , "Collector's item" , "E.g. crime figure" , "part of a table perhaps" .)