Ignominious failure (6)
I believe the answer is:
fiasco
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ignominious failure</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 fiasco that I've seen before include "A hopeless mess or ludicrous failure" , "Utter failure, debacle" , "Farcical disaster" , "Total debacle" , "Embarrassing failure" .)