Number in an octet (5)
I believe the answer is:
eight
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">number in an octet</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 eight that I've seen before include "Half a quarter" , "Cube of two" , "No. of stones in cwt." , "Two fours" , "Number in octet" .)