Ponderous (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ponderous</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for leaden that I've seen before include "Dull, heavy, slow" , "Oppressive" , "Heavy - overcast" , "Heavy or slow, like dark-gray metal" , "Heavy - plodding" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ponderous</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for heavy that I've seen before include "Difficult to lift" , "Oppressive" , "Of great weight" , "serious!" , "Hard to lift" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ponderous</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 slow that I've seen before include "not bright" , "(Clock) behind" , "Reluctant" , "Lose velocity" , "Moving at low speed" .)