Note turned up behind Book of Memories (5)
I believe the answer is:
album
'book of memories' is the definition.
(I've seen this in another clue)
'note turned up behind' is the wordplay.
'note' becomes 'la' (musical note as in do-re-mi).
'turned' says the letters should be written in reverse.
'up behind' becomes 'bum' (synonyms. I am not sure about the 'up' bit.).
'la' backwards is 'al'.
'al'+'bum'='ALBUM'
Can you help me to learn more?
(Other definitions for album that I've seen before include "series of tracks" , "Item of music released" , "Book of blank pages for collectables, memorabilia etc." , "Book for keeping photos, stamps, etc" , "place for photos" .)