Narrow-edged tooth (7)
I believe the answer is:
incisor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">narrow-edged tooth</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 incisor that I've seen before include "something with bite" , "carnivore requires?" , "Narrow-edged tooth" , "cutter" , "oral equipment" .)