Acrid (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">acrid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for bitter that I've seen before include "Sharp-tasting or resentful" , "Sour kind of English ale?" , "severe" , "Resentful, being piercingly cold" , "Intensely cold, beer" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">acrid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pungent that I've seen before include "Strong-smelling" , "Sharp - caustic" , "Offensive" , "Biting" , "Having a strong smell" .)