The most common and most likely answer to this crossword clue is the 9 letter word WINDFALLS
I've seen this crossword clue in The Daily Telegraph
W
I
N
D
F
A
L
L
S
More clues leading to the result WINDFALLS
Buddy explains!
The straight part
We know that "Yield after a powerful blow" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case yield after a powerful blow = windfalls.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 WINDFALLS mean?
WINDFALLS 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.