Furious about line in Get Back (7)

I believe the answer is:

salvage

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'get back' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for salvage that I've seen before include "Recovery of wrecks" , "Rescue (lost cargo)" , "Rescue of property as from fire or flood" , "Rescue of a ship's cargo" , "Manage to retain" .)

I've seen this clue in The Sun.

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