Who gets back to a dog? (9)

I believe the answer is:

retriever

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'to a dog?' is the definition.
(eg a Golden Retriever)

I can't explain the rest of the clue.

(Other definitions for retriever that I've seen before include "Barker" , "He brings back" , "Dog trained to pick up game" , "making a complete recovery?" , "He rescues" .)

I've seen this clue in the Sydney Morning Herald.

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