Cutback after evisceration of extremes (5)
I believe the answer is:
polar
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for polar that I've seen before include "Relating to the end regions of the earth's axis" , "Of the cold regions" , "Of the frozen regions" , "Type of bear" , "Relating to the cold areas of earth" .)