This year’s upsetting panic (8)
I believe the answer is:
hysteria
'panic' is the definition.
(thesaurus)
'this year's upsetting' is the wordplay.
'upsetting' indicates anagramming the letters.
'this'+'year'='thisyear'
'thisyear' anagrammed gives 'HYSTERIA'.
(Other definitions for hysteria that I've seen before include "display of wild emotion" , "Ogden -, US poet" , "Is hearty about losing the plot" , "Uncontrollable emotion -- this year (anag)" , "Extreme emotional state of instability" .)