Settles down (6)
I believe the answer is:
roosts
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">settles down</span>' is the definition.<br/ ><span class="explanation-format__explanation">(roosting is a kind of settling down)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for roosts that I've seen before include "Henhouses" , "'Rests on a perch, like a chicken (6)'" , "Of bird, settles for sleep" , "Where birds settle to sleep" , "Stays" .)