Caustic substance (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">caustic substance</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 acid that I've seen before include "Caustic and biting" , "Bitter substance" , "- - -drop, sweet" , "Battery fluid" , "Drug, tart" .)
(Other definitions for lime that I've seen before include "white caustic earth" , "White substance used in cement" , "alkaline" , "Sharp-tasting fruit" , "Bright light green" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">caustic substance</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 lye that I've seen before include "solution that comes out in the wash?" , "Strong alkaline solution" , "Alkali washing solution" , "caustic liquid" , "Strongly alkaline wash" .)