Decimal fraction (5)
I believe the answer is:
tenth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">decimal fraction</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tenth that I've seen before include "0.1" , "after nine" , "One behind ninth" , "Ordinal number" , "Fraction; last in the hit parade?" .)