Severe, harsh (10)
I believe the answer is:
astringent
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">severe</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">harsh</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(harsh can mean astringent or severe)</span><br/ ><br/ ></span>
(Other definitions for astringent that I've seen before include "Harsh" , "Lotion" , "Styptic" , "(Of taste) sharp, bitter" , "(Medication) causing contraction - stern giant (anag)" .)