Lip, threshold (5)
I believe the answer is:
brink
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">lip</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">threshold</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that threshold can be written as brink)</span><br/ ><br/ ></span>
(Other definitions for brink that I've seen before include "Verge of an event" , "Threshold" , "Edge of precipice" , "Edge (of disaster etc)" , "Verge (of war etc)" .)