Hasty anger, perhaps! (8)
I believe the answer is:
hysteria
'hasty anger' is the definition.
The answer and definition can be both feelings as well as being singular nouns.
Maybe they are linked in a way I don't understand?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for hysteria that I've seen before include "Is hearty about losing the plot" , "Frenzied emotional state" , "frenzied excitement" , "Overemotional state" , "Uncontrollable emotion -- this year (anag)" .)