Refuge, hiding place (4-4)
I believe the answer is:
bolt-hole
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">refuge</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">hiding place</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for bolt-hole that I've seen before include "Place to which one can escape" , "Refuge from danger - escape route" .)