Slow-moving nocturnal primate (5)
I believe the answer is:
loris
'slow-moving nocturnal primate' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for loris that I've seen before include "Short-tailed mammal" , "Slow-moving nocturnal primate" , "Nocturnal primate of Southeast Asia (usually slender or slow)" , "Small nocturnal primate" , "lemur" .)