Certain to fail (8)
I believe the answer is:
hopeless
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">certain to fail</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hopeless that I've seen before include "Incompetent" , "Despairing or futile" , "Feeling despair; very bad" , "Vain" , "Unachievable" .)