Panic derailed this year (8)

I believe the answer is:

hysteria

I'm a little stuck... Click here to teach me more about this clue!

'panic' is the definition.
(hysteria is uncontrollable panic)

'derailed this year' is the wordplay.
'this year' can be anagrammed to 'HYSTERIA'.
However, I am unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for hysteria that I've seen before include "frenzied excitement" , "Ogden -, US poet" , "Frenzied emotional state" , "display of wild emotion" , "highly emotional state" .)

I've seen this clue in the Sydney Morning Herald.

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