Crossword Genius

An invention brought in by a foreigner (5)

Ross

I believe the answer is:

alien

'a foreigner' is the definition.
('alien' can be a synonym of 'foreigner')

'an invention brought in' is the wordplay.
'invention' becomes 'lie'.
'brought in' is an insertion indicator.
'an' enclosing 'lie' is 'ALIEN'.

'by' acts as a link.

(Other definitions for alien that I've seen before include "Foreign - film directed by Ridley Scott" , "Foreign (from outer space?)" , "Offensive" , "Being from another world" , "extraneous" .)

I've seen this clue in the Evening Standard.
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