Nightclub almost getting small records (5)
I believe the answer is:
discs
'records' is the definition.
('disc' can be a synonym of 'record')
'nightclub almost getting small' is the wordplay.
'nightclub' becomes 'disco' (a disco is a club for dancing).
'almost' means to remove the last letter (most of the word but not all of it).
'getting' means one lot of letters go next to another.
'small' becomes 's' (abbreviation - e.g. clothes size).
'disco' with its final letter taken away is 'disc'.
'disc'+'s'='DISCS'
(Other definitions for discs that I've seen before include "Flat, thin circular objects" , "Type of recordings" , "Flat, circular plates" , "They're round and flat" , "Layers of cartilage between vertebrae - they may slip" .)