Raised edge (3)
I believe the answer is:
rim
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">raised edge</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rim that I've seen before include "Brink" , "Circular outer edge" , "Circumference" , "'Brim, lip (3)'" , "An edge, canyon or cup" .)