Fail to go along with vacuous party disc (6)
I believe the answer is:
floppy
'disc' is the definition.
(floppy is a kind of disc)
'fail to go along with vacuous party' is the wordplay.
'fail' becomes 'flop' (flopping is a kind of failing).
'to go along with' says to put letters next to each other.
'vacuous' means to remove the middle letters.
'party' with its centre taken out is 'py'.
'flop'+'py'='FLOPPY'
(Other definitions for floppy that I've seen before include "Type of disc" , "Sort of disk" , "Flexible computer disc" , "Limp - computer disk" , "Hanging loosely" .)