Nan (7)
I believe the answer is:
grandma
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nan</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that nan can be written as grandma)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for grandma that I've seen before include "family member" , "Parent's mother" , "Darn, Mag is older relation" , "standing before Moses in painting" , "Rang dam about a relative" .)