Founder (8)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">founder</span>' is the definition.<br/ ><span class="explanation-format__explanation">(sinking is a kind of foundering)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sink that I've seen before include "Get worse" , "Subside" , "Kitchen equipment - founder" , "Excavate (a well)" , "Go down (in the kitchen?)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">founder</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for collapse that I've seen before include "fold" , "Founder" , "Give way, fail suddenly" , "Faint and fall" , "Fall or disintergrate" .)