The most common and most likely answer to this crossword clue is the 9 letter word EXCITABLE
I've seen this crossword clue in The Daily Telegraph
E
X
C
I
T
A
B
L
E
More clues leading to the result EXCITABLE
- Times probing City board after one gets volatile
- Hot-headed and no longer worth quoting
- Volatile former partner worthy of quoting
- Volatile lover of old guy keeps it hidden
- Celibate pinching kiss getting worked-up and emotional
- Passionate former wife with guy possessing sex appeal
- Passionate kiss involved in transformation of celibate
Buddy explains!

The straight part
We know that "emotional" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case emotional = excitable.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 EXCITABLE mean?
EXCITABLE adjective- Easily excited
- Able to be promoted to an excited state