The most common and most likely answer to this crossword clue is the 9 letter word ECSTASIES
I've seen this crossword clue in Independent
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The straight part
We know that "emotional states" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case emotional states = ecstasies.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 ECSTASIES mean?
ECSTASIES noun- Intense pleasure.
- A state of emotion so intense that a person is carried beyond rational thought and self-control.
- A trance, frenzy, or rapture associated with mystic or prophetic exaltation.
- Violent emotion or distraction of mind; excessive grief from anxiety; insanity; madness.
- The drug MDMA, a synthetic entactogen of the methylenedioxyphenethylamine family, especially in a tablet form.
- A state in which sensibility, voluntary motion, and (largely) mental power are suspended; the body is erect and inflexible; but the pulse and breathing are not affected.