Foiled (8)
I believe the answer is:
thwarted
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">foiled</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that foiled can be written as thwarted)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for thwarted that I've seen before include "Prevented from succeeding (in something)" , "Frustrated and foiled" , "stopped?" .)