Books possibly considered groovy? (6)

I believe the answer is:

albums

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'books' is the definition.
(album is a kind of book)

I cannot understand how the rest of the clue works.

(Other definitions for albums that I've seen before include "Photograph books" , "Stamp collector's books" , "LPs, CDs" , "Books of photos or music disks" , "Sets of tracks" .)

I've seen this clue in the Evening Standard.

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