Stranger with an entertaining story (5)
I believe the answer is:
alien
'stranger' is the definition.
(synonyms)
'an entertaining story' is the wordplay.
'entertaining' indicates putting letters inside.
'story' becomes 'lie' (story can mean a fabrication).
'an' going around 'lie' is 'ALIEN'.
'with' is the link.
(Other definitions for alien that I've seen before include "coming from overseas" , "One is from outer space, perhaps" , "repugnant" , "exciting film based in space" , "Belonging to a foreign country" .)