Crossword Genius

Sound hints for fixing a hammock (5)

Ross

I believe the answer is:

clews

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'sound hints' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Maybe there's a link between them I don't understand?

I cannot understand how the remainder of the clue works.

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