Reach a low point (3,4,6)
I believe the answer is:
hit rock bottom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reach a low point</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 hit rock bottom that I've seen before include "Reach one's lowest ebb" , "Be in the worst possible situation" .)