Astringent (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">astringent</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that astringent can be written as styptic)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for styptic that I've seen before include "Checking blood flow like shaving pencil" , "Stopping bleeding" , "This pencil checks bleeding as from shaving" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">astringent</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for caustic that I've seen before include "Chemically burning" , "Acrimonious - sarcastic" , "Burning, corroding" , "Acrid" , "Bitter - corrosive" .)