Strange; uneven (3)
I believe the answer is:
odd
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">strange</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">uneven</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 odd that I've seen before include "standing out from the crowd?" , "Peculiar in uneven way" , "Left over" , "Rum" , "Casual" .)