Machine used for lifting bird (5)
I believe the answer is:
crane
This clue is a double definition.
'machine used for lifting' is the first definition.
(construction machine)
'bird' is the second definition.
(crane is a kind of bird)
(Other definitions for crane that I've seen before include "Large long-necked wading bird" , "Lifting device; stretch (neck)" , "American writer" , "Wading bird - lifting device" , "To do it could mean a long stretch" .)