The most common and most likely answer to this crossword clue is the 9 letter word HAYMAKERS
I've seen this crossword clue in The Guardian
H
A
Y
M
A
K
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More clues leading to the result HAYMAKERS
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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 HAYMAKERS mean?
HAYMAKERS noun- A person or machine which harvests or prepares tall grass for use as animal fodder.
- (fisticuffs) A particularly powerful punch, especially one which knocks down an opponent, thrown like a scythe chop for cutting hay, as agricultural haymakers used to have strong arms.
- (by extension) Any decisive blow, shock, or forceful action.