Nutritive mineral (4)
I believe the answer is:
iron
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nutritive mineral</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for iron that I've seen before include "Box-shaped instrument of torture -- no meridian (anag)" , "1 down, symbol Fe" , "Former dividing line across Europe" , "Fe - golf club" , "Metal - press" .)