1942 translation by Arthur Waley of novel Journey to the West, attributed to Wu Cheng'en (6)
I believe the answer is:
monkey
(Other definitions for monkey that I've seen before include "Araucaria -- evergreen conifer" , "Chile pine (the Araucaria tree)" , "Long-tailed primate" , "Small primate" , "Any of various long-tailed primates" .)