Records and blank books with sleeves (6)
I believe the answer is:
albums
'records' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for albums that I've seen before include "Books of photos or music disks" , "LPs, CDs" , "Books of blank pages, for photographs say" , "Stamp collector's books" , "Blank book (for stamps)" .)