The most common and most likely answer to this crossword clue is the 10 letter word AFTERMATHS
I've seen this crossword clue in The Daily Telegraph
A
F
T
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M
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S
More clues leading to the result AFTERMATHS
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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 AFTERMATHS mean?
AFTERMATHS noun- A second mowing; the grass which grows after the first crop of hay in the same season.
- That which happens after, that which follows, usually of strongly negative connotation in most contexts, implying a preceding catastrophe.