Swallow's construction (4)
I believe the answer is:
nest
(Other definitions for nest that I've seen before include "comfortable residence" , "Den" , "Home of twigs, perhaps" , "Eyrie" , "Structure to lay eggs" .)
I believe the answer is:
nest
(Other definitions for nest that I've seen before include "comfortable residence" , "Den" , "Home of twigs, perhaps" , "Eyrie" , "Structure to lay eggs" .)