Wild emotionalism (8)
I believe the answer is:
hysteria
'wild emotionalism' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hysteria that I've seen before include "Wild emotionalism" , "Uncontrollable fear" , "neurotic disorder" , "State of violent mental agitation" , "Extreme emotional state of instability" .)