A line associated with worthless band's work (5)
I believe the answer is:
album
'band's work' is the definition.
(bands record albums)
'a line associated with worthless' is the wordplay.
'line' becomes 'l' (used when specifying particular lines from a poem).
'associated with' means one lot of letters go next to another.
'worthless' becomes 'bum' (I've seen this in other clues).
'a'+'l'+'bum'='ALBUM'
(Other definitions for album that I've seen before include "Item of music released" , "Photograph/stamp book" , "Cuttings book" , "Compilation of recordings" , "Pictures" .)