Madagascan primates (6)
I believe the answer is:
lemurs
'madagascan primates' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for lemurs that I've seen before include "Arboreal creatures with pointed snouts" , "Tree-dwelling primate with large eyes and long busy tails" , "Monkey-like animals of Madagascar" , "Arboreal primates with pointed snouts and long tails" , "long-tailed animals" .)