Outside limit (4)
I believe the answer is:
edge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">outside limit</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 edge that I've seen before include "Perimeter" , "Cutting side as of knife, or margin" , "Move slowly" , "Create borders" , "Steal" .)