It may be out on a limb (4)
I believe the answer is:
nest
'it may be out on a limb' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nest that I've seen before include "Stack of tables" , "Bird shelter" , "Sent to avian home" , "Ingredient of Chinese soup" , "Cosy home like bird's" .)