Slender dagger (8)
I believe the answer is:
stiletto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">slender dagger</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 stiletto that I've seen before include "Tapering dagger" , "dangerous weapon" , "Thin dagger; heel" , "High-heeled shoe" , "Kind of heel" .)