The French race is foreign, obviously (4)

I believe the answer is:

lett

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'foreign obviously' is the definition.
I can't tell whether this defines the answer.

'the french race' is the wordplay.
'the french' becomes 'le' ('the' in French).
'race' becomes 'tt'.
'le'+'tt'='LETT'

'is' acts as a link.

Can you help me to learn more?

(Other definitions for lett that I've seen before include "East European" , "northerner" , "Native of Latvia" , "Baltic citizen" , "Balt" .)

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