Birds from other nests (5)
I believe the answer is:
ernes
'birds' is the definition.
(erne is a kind of bird)
'from other nests' is the wordplay.
'from' indicates a hidden word.
'ERNES' can be found hidden inside 'other nests'.
(Other definitions for ernes that I've seen before include "Certain birds" , "They fly across the sea" , "Sea-eagles" , "sea eagles" , "Irish lough's" .)