Not divisible by two (3)
I believe the answer is:
odd
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not divisible by two</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 odd that I've seen before include "It's certainly not even" , "Peculiar or eccentric" , "Bizarre - occasional" , "unlike 1984" , "Not even; strange" .)