Kind of triangle (9)
I believe the answer is:
isosceles
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">kind of triangle</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 isosceles that I've seen before include "(Of triangles) having two sides the same" , "Of triangular, with two sides of equal length" , "Kind of triangle" , "Describing a triangle with two equal sides" , "Triangle with two sides of equal length" .)