Unusual, abnormal (8)
I believe the answer is:
atypical
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">unusual</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">abnormal</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for atypical that I've seen before include "Uncharacteristic" , "Abnormal, aberrent." , "Not as expected" , "Not normal" , "Unusual" .)