Crossword Genius

Shelter for stray slugs (6)

Ross

I believe the answer is:

pounds

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'slugs' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps you can see an association between them that I can't see?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for pounds that I've seen before include "Imperial measures and currency" , "UK monetary units" , "Hammers" , "Crushes or beats with repeated blows" , "Cash" .)

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