The bed of the sea (7)

I believe the answer is:

hammock

I'm a little stuck... Click here to teach me more about this clue!

'the bed' is the definition.
(hammock is a kind of bed)

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

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

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

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.