Perch (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">perch</span>' is the definition.<br/ ><span class="explanation-format__explanation">(roost is a kind of perch)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for roost that I've seen before include "Place for sleeping birds" , "suitable sleeping-place" , "(Bird) settle for sleep" , "Rest on a perch" , "Bird's night-time perch" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">perch</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sit that I've seen before include "Take a chair" , "Perch" , "as magistrates do" , "Be seated" , "I sell badly the cotton yarn" .)