Bird in an early warning system (6)
I believe the answer is:
canary
(Other definitions for canary that I've seen before include "Type of finch" , "Yellow bird, formerly taken down mines" , "Yellow singing bird" , "singer" , "Pet bird" .)
I believe the answer is:
canary
(Other definitions for canary that I've seen before include "Type of finch" , "Yellow bird, formerly taken down mines" , "Yellow singing bird" , "singer" , "Pet bird" .)