Thick (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">thick</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dense that I've seen before include "Thick and tightly-packed" , "Needs (anag) -- thick" , "Close knit" , "Closely spaced or extremely stupid" , "Thick as undergrowth may be" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">thick</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for solid that I've seen before include "Firm - sound - reliable" , "Neither liquid nor gas" , "cone-shaped, say" , "Substantial - having three dimensions" , "Firm - three-dimensional" .)
(Other definitions for clueless that I've seen before include "Knowing nothing" , "Stupid (so unable to do crossword?)" , "like a crossword setter getting stuck?" , "unlike this puzzle!" , "Completely at sea about what's going on" .)