Crossword Genius

Sour-tasting substance (4)

Ross

I believe the answer is:

acid

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sour-tasting substance</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for acid that I've seen before include "Corrosive substance" , "Sour - LSD" , "Bitter or sour" , "Bitter; biting" , "Sour to the taste" .)

I've seen this clue in The Mirror.
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