Calla lily family (4)
I believe the answer is:
arum
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">calla lily family</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for arum that I've seen before include "A sort of lily." , "genus of plants" , "Plant of the family Araceae, eg lords-and-ladies" , "A spirit for a lily" , "plant with a white spathe" .)