Recording almost entirely worthless (5)
I believe the answer is:
album
'recording' is the definition.
(I know that album is a type of album)
'almost entirely worthless' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'entirely' becomes 'all' (I've seen this in another clue).
'worthless' becomes 'bum' (I've seen this in other clues).
'all' with its last letter removed is 'al'.
'al'+'bum'='ALBUM'
(Other definitions for album that I've seen before include "Record with multiple tracks" , "Long-playing record" , "Blank book for keeping stamps, photographs etc" , "Recording; book" , "Compilation of recordings" .)