Strange story appearing in article (5)
I believe the answer is:
alien
'strange' is the definition.
(synonyms)
'story appearing in article' is the wordplay.
'story' becomes 'lie' (story can mean a fabrication).
'appearing in' indicates putting letters inside.
'article' becomes 'an' (indefinite article).
'lie' going inside 'an' is 'ALIEN'.
(Other definitions for alien that I've seen before include "coming from overseas" , "Belonging to a foreign country" , "Being from another world" , "movie!" , "One is from outer space, perhaps" .)