Two signs merge to show where books may be obtained (9)
I believe the answer is:
libraries
'two signs' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe there's an association between them I don't understand?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for libraries that I've seen before include "Book repositories" , "Book depositories" , "Collections" , "They house books" , "facilities for readers" .)