Outer boundary (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">outer boundary</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 edge that I've seen before include "Intense quality; limit" , "Sharpness of mind" , "Border - meeting place" , "Rim - move gradually" , "Border - advantage" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">outer boundary</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for periphery that I've seen before include "Edge -- border" , "margin" , "Surrounding region" .)