Occasional record with one disco dancing (8)
I believe the answer is:
episodic
'occasional' is the definition.
('episodic' can be a synonym of 'occasional')
'record with one disco dancing' is the wordplay.
'record' becomes 'ep'.
'with' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'dancing' indicates anagramming the letters.
'disco' is an anagram of 'isodc'.
'i' inserted within 'isodc' is 'isodic'.
'ep'+'isodic'='EPISODIC'
(Other definitions for episodic that I've seen before include "Occurring irregularly - is copied accordingly" , "in serial form" , "Occurring at irregular intervals" , "piecemeal" , "taken one piece at a time" .)