Formidable (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">formidable</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 potent that I've seen before include "Concentrated or strong, like liquor" , "Forceful" , "Intoxicating" , "Strong or effective" , "Top Ten (anag.)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">formidable</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 fearsome that I've seen before include "Frightful" , "Of frightening appearance" , "Formidable" , "Dreadful" , "Awful" .)