Find nightclub jolly (9)
I believe the answer is:
discovery
'find' is the definition.
(I know that find can be written as discovery)
'nightclub jolly' is the wordplay.
'nightclub' becomes 'disco' (a disco is a club for dancing).
'jolly' becomes 'very' (I've seen this in other clues).
'disco'+'very'='DISCOVERY'
(Other definitions for discovery that I've seen before include "Find - Scott's ship" , "Space shuttle which launched the Hubble telescope" , "Something newly found" , "Bay in southeast Australia" , "Detection, unearthing" .)