Spasmodic performance is copied (8)
I believe the answer is:
episodic
'spasmodic' is the definition.
(thesaurus)
'performance is copied' is the wordplay.
'is copied' can be anagrammed to 'EPISODIC'.
Though, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for episodic that I've seen before include "Sporadic" , "Occurring irregularly - is copied accordingly" , "Is copied in irregular occurrence" , "taken one piece at a time" , "Intermittent" .)