Turn out a failure (4,2,7)
I believe the answer is:
come to nothing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">turn out a failure</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 come to nothing that I've seen before include "Fail" , "Turn out a failure" , "Result in failure" .)