Unopened body of work describing he who went to Hell and back? (7)

I believe the answer is:

orpheus

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'he who went to hell and back?' is the definition.
(legendary Greek who rescued wife from underworld)

I can't explain the rest of the clue.

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(Other definitions for orpheus that I've seen before include "Legendary musician" , "Taj Mahal city" , "A fabulous musician" , "Husband to Eurydice" , "In Greek myth, poet who followed Eurydice into the Underworld" .)

I've seen this clue in The Everyman puzzle in The Observer.

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