Pork knuckle originally made for husband in bed (7)

I believe the answer is:

hammock

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'bed' is the definition.
(I know that hammock is a type of bed)

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

Can you help me to learn more?

(Other definitions for hammock that I've seen before include "Bed tied between trees?B" , "Resting place slung under tree etc" , "Hanging cloth bed" , "A suspended canvas or rope bed" , "Suspended recliner" .)

I've seen this clue in The Independent.

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