Grand Canyon viewpoint (3)
I believe the answer is:
rim
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">grand canyon viewpoint</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rim that I've seen before include "'Brim, lip (3)'" , "Brink" , "Edge, border" , "Top edge" , "Edge or margin" .)