Crossword Genius

Shells erode farm view from the sound (7)

Ross

I believe the answer is:

nautili

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'shells' is the definition.
The answer and definition can be both animals as well as being plural nouns.
Maybe they are linked in a way I don't understand?

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

Can you help me to learn more?

(Other definitions for nautili that I've seen before include "marine life" , "creatures in the sea" , "Cephalopod molluscs" .)

I've seen this clue in the Sydney Morning Herald.
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