The most common and most likely answer to this crossword clue is the 8 letter word CALAMITY
I've seen this crossword clue in The Guardian
C
A
L
A
M
I
T
Y
More clues leading to the result CALAMITY
- Musically, Jane was a disaster
- A thrash in large town is a disaster
- See surrounding area strike disaster
- Some energy and friendship for Jane
- A measure of warmth and friendship for Jane, maybe
- Jane could be a disaster
- Briefly state friendship is a disaster
- Jane Austen’s life, a memoir starts appearing in London, perhaps
- A strike in the heart of London causes disaster
- Friendship sustains Conservative with extremely awful affliction
Buddy explains!

The straight part
We know that "disaster" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case disaster = calamity.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 CALAMITY mean?
CALAMITY noun- An event resulting in great loss.
- The distress that results from some disaster.