Crossword Genius

Birds which lift and move heavy weights?

Ross

I believe the answer is:

cranes

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'birds' is the definition.
(crane is a kind of bird)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for cranes that I've seen before include "Lifting machines and long-necked birds" , "Lifting machines and wading birds" , "Makes an effort to see" , "Lifting machines or large birds" , "Wading birds with long legs and necks" .)

I've seen this clue in The Irish Independent.
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