No longer bound to deliver (3,4)

I believe the answer is:

set free

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

I don't understand the rest of the clue.

(Other definitions for set free that I've seen before include "Uncaged birds have been" , "Turn loose" , "Released" , "no longer confined" , "Clear" .)

I've seen this clue in The Globe and Mail and The Irish News.

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