Mammal of North America with alternating light and dark rings on its tail (7)
I believe the answer is:
raccoon
(Other definitions for raccoon that I've seen before include "North American omnivore" , "Furry American mammal" , "Nocturnal mammal native to N America, and its fur" , "North American mammal with a ringed tail" , "Mammal with pointed muzzle and long tail" .)