Visitor from another world (5)
I believe the answer is:
alien
'visitor from another world' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for alien that I've seen before include "Foreign; extraterrestrial" , "Belonging to a foreign country" , "Unfamiliar; foreign" , "Foreigner, outsider" , "Creature from another planet" .)