Strange story included in article (5)
I believe the answer is:
alien
'strange' is the definition.
('alien' can be a synonym of 'strange')
'story included in article' is the wordplay.
'story' becomes 'lie' (I've seen this before).
'included in' indicates putting letters inside.
'article' becomes 'an' (indefinite article).
'lie' put into 'an' is 'ALIEN'.
(Other definitions for alien that I've seen before include "Unfamiliar; foreign" , "Martian, say" , "of foreigners" , "Someone from outer space?" , "Being from another world" .)