Alien from Aden (4)
I believe the answer is:
dane
'alien' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'from aden' is the wordplay.
'from' indicates an anagram (the anagram comes from the same letters).
'aden' with letters rearranged gives 'DANE'.
Can you help me to learn more?
(Other definitions for dane that I've seen before include "Great - - , dog" , "Person from Copenhagen" , "Hamlet, say" , "Hamlet was one" , "Hamlet -- as described by 12 [GLOOMY]" .)