They raise long-legged birds (6)
I believe the answer is:
cranes
'long-legged birds' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for cranes that I've seen before include "Lifting machines and wading birds" , "Lifting machines or large birds" , "Wading birds with long legs and necks" , "Long-legged birds or heavy lifting machines" , "Long-necked wading birds" .)