Uncontrolled emotion blowing up this year (8)
I believe the answer is:
hysteria
'uncontrolled emotion' is the definition.
(I've seen this before)
'blowing up this year' is the wordplay.
'blowing up' is an anagram indicator.
'this'+'year'='thisyear'
'thisyear' anagrammed gives 'HYSTERIA'.
(Other definitions for hysteria that I've seen before include "Is hearty about losing the plot" , "Uncontrollable fear" , "Mental disturbance" , "Overemotional state" , "Problem of the uncontrolled" .)