Crossword Genius

Foreigner allowed to finish first (4)

Ross

I believe the answer is:

lett

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'foreigner' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?

'allowed to finish first' is the wordplay.
'allowed' becomes 'let' (I've seen this before).
'to finish' says to take the final letters.
The last letter of 'first' is 't'.
'let'+'t'='LETT'

Can you help me to learn more?

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

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