The most common and most likely answer to this crossword clue is the 8 letter word WINDFALL
W
I
N
D
F
A
L
L
More clues leading to the result WINDFALL
- Have a fruit drop!
- Bonanza wife and daughter dipped into in autumn
- You wouldn’t expect this bend on trip
- Snake’s come a cropper, an unexpected bonus
- Current drop in unexpected income
- Find out intramural unexpected wealth
- Bonus of seeing Germany collapse after victory?
- Germany collapse after victory — that’s a bonus
- Turn decline into unexpected good fortune
- Unexpected but fruitful result of a sharp blow
Buddy explains!

The straight part
We know that "unexpected income" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unexpected income = windfall.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 WINDFALL mean?
WINDFALL noun- Something that has been blown down by the wind.
- A fruit that has fallen from a tree naturally, as from wind.
- A sudden large benefit; especially, a sudden or unexpected large amount of money, as from lottery or sweepstakes winnings or an unexpected inheritance or gift.