Refrained from harming (6)
I believe the answer is:
spared
'refrained from harming' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spared that I've seen before include "Saved" , "Showed mercy, refrained from hurting" , "Treated mercifully" , "forgiven" , "Voluntarily parted with" .)