By the sound of it, albatross an albatross? (6)

I believe the answer is:

burden

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'albatross?' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

(Other definitions for burden that I've seen before include "Load or responsibility carried" , "Onerous or difficult load" , "Onerous weight" , "Unwelcome load" , "Weigh down - load" .)

I've seen this clue in The Guardian.

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