Where eggs are laid (4)
I believe the answer is:
nest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">where eggs are laid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for nest that I've seen before include "Den" , "Home to a bird" , "Sent to bird's home" , "Accommodation for hobby, say" , "Sent to avian home" .)