Some exile murdering a Madagascan native (5)
I believe the answer is:
lemur
'madagascan native' is the definition.
(animal native to Madagascar)
'some exile murdering a' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'LEMUR' can be found hidden inside 'exile murdering a'.
(Other definitions for lemur that I've seen before include "Ring-tailed prosimian" , "Primate found only in Madagascar" , "Madagascan primate" , "Monkey-like creature of Madagascar" , "Malagasy primate" .)