Crossword Genius

Caustic — virulent (5)

Ross

I believe the answer is:

acrid

<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">caustic</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that caustic can be written as acrid)</span><br/ ><br/ >'<span class="explanation-format__original">virulent</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that virulent can be written as acrid)</span><br/ ><br/ ></span>

(Other definitions for acrid that I've seen before include "Sharp - biting" , "causing corrosion" , "Bitterly pungent" , "Astringent" , "Unpleasantly bitter" .)

I've seen this clue in The Guardian.
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