Older relative
(Other definitions for elder that I've seen before include "Church official; tree" , "Older person - one's senior" , "Kind of tree or sage person" , "Patriarch" , "Senior churchperson" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">older relative</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for grannie that I've seen before include "old lady" , "senior citizen, perhaps" , "Older relative" .)