Balm ingredient (4)
I believe the answer is:
aloe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">balm ingredient</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 aloe that I've seen before include "Flower, maybe vera" , "shrub" , "Fleshy-leaved plant" , "Bitter drug from a leaf juice" , "has a bitter taste" .)