The most common and most likely answer to this crossword clue is the 9 letter word RAINSTORM
I've seen this crossword clue in The Guardian
R
A
I
N
S
T
O
R
M
More clues leading to the result RAINSTORM
- Minor star snapped in a power shower?
- Minor star playing in very poor conditions
- Bad weather expected mostly to stay in the memory
- Right arm is not broken in heavy fall
- Mental aberration — losing head — in spell of bad weather
- Collapsed minor star in meteorological phenomenon
- Mental aberration dismissing start of beautiful weather event
- Dress in smart clothing or it’ll be a dampener
- Mental aberration dismissing start of balmy weather event
- Sudden mental aberration losing head in squall
Buddy explains!
The straight part
We know that "Reason for cancelling outdoor event" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case reason for cancelling outdoor event = rainstorm.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 RAINSTORM mean?
RAINSTORM noun- A storm characterized by substantial, heavy rainfall.