The most common and most likely answer to this crossword clue is the 6 letter word AHIMSA
I've seen this crossword clue in The Daily Telegraph
A
H
I
M
S
A
Buddy explains!

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 AHIMSA mean?
AHIMSA noun- A doctrine of non-violence, concerned with the sacredness of all living things and an effort to avoid causing harm to them.