Repelled attack to abduct son! Many put out of action (6)
I believe the answer is:
disarm
But I can't explain it at all! Could you help me understand?
(Other definitions for disarm that I've seen before include "Take away weapons or make less angry" , "Confiscate weapon or mollify" , "Abandon weapons" , "Mollify or remove weapon from" , "to allay hostility" .)