Range, extent (4)
I believe the answer is:
span
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">range</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">extent</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for span that I've seen before include "Distance between two points in time or place" , "Bridge or range" , "Ox team; bridge" , "A bridge or measure of width" , "Team of two matched oxen" .)