Crossword Genius

Two overlapping signs for lenders (9)

Ross

I believe the answer is:

libraries

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

This could be a double definition.

'two overlapping signs' is the first 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?

'lenders' is the second definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.

'for' acts as a link.

Can you help me to learn more?

(Other definitions for libraries that I've seen before include "They house books" , "facilities for readers" , "Book depositories" , "Book repositories" , "Reading rooms" .)

I've seen this clue in The Independent.
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