Become fixed (5)
I believe the answer is:
lodge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">become fixed</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 lodge that I've seen before include "Provide quarters" , "Become fixed; small house" , "present" , "Beaver's nest" , "Cottage at the entrance to the grounds of a big house" .)