They rise in anger (7)
I believe the answer is:
hackles
'anger' is the definition.
(I know that hackles is a type of anger)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for hackles that I've seen before include "Hairs on back of an animal's neck - shackle them" , "Shackle with animal neck-hairs" , "Hairs on back of animal's neck, may rise with anger" , "They rise on the angry" .)