The most common and most likely answer to this crossword clue is the 8 letter word HYSTERIA
I've seen this crossword clue in Financial Times
H
Y
S
T
E
R
I
A
More clues leading to the result HYSTERIA
- Uncontrolled emotion blowing up this year
- Infectious condition is awful this year
- Psychological problem developed this year
- Neurosis treated this year
- Turmoil in Syria, the state having lost control
- Vow not to be in variety show cast after such frenzy
- Bad hair day set lawyer going, resulting in panic
- Panic this year in resort
- Shyster, I assume, conceals agitation
- Fancy it, say, with her neurotic disorder
Buddy explains!

The straight part
We know that "Neurosis" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case neurosis = hysteria.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does HYSTERIA mean?
HYSTERIA noun- A condition where the patient has neurological symptoms such as numbness, blindness, paralysis, or fits, but without any neurological explanation.
- Behavior exhibiting excessive or uncontrollable emotion, such as fear or panic.
- A mental disorder characterized by emotional excitability etc. without an organic cause.
- (until early 20th century) Any disorder of women with some psychiatric symptoms without other diagnosis, ascribed to uterine influences on the female body, lack of pregnancy, or lack of sex.