The most common and most likely answer to this crossword clue is the 8 letter word DELIRIUM
I've seen this crossword clue in The Daily Telegraph
D
E
L
I
R
I
U
M
More clues leading to the result DELIRIUM
- One badger occupying earth when put back in wild state
- Raving dean's foremost priest, one into drink
- Designer Jean and I were first up in a state of ecstasy
- Lied about drink I swallowed producing wild excitement
- Food shop I established in spirit and excitement
- After one’s admitted, ruled I’m suffering hysteria
- Food shop that’s odd has one in a state of agitation
- Raving Greek character, one annoyed, upset
- Heath: “I governed, in retrospect, in a confused state”
- Lied about one possessed by spirit and passion
Buddy explains!

The straight part
We know that "hysteria" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hysteria = delirium.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 DELIRIUM mean?
DELIRIUM noun- A temporary mental state with a sudden onset, usually reversible, including symptoms of confusion, inability to concentrate, disorientation, anxiety, and sometimes hallucinations. Causes can include dehydration, drug intoxication, and severe infection.