Crossword Genius

Be the boss of some foreigners (5)

Ross

I believe the answer is:

reign

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'be the boss' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'some foreigners' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'REIGN' can be found hidden inside 'foreigners'.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for reign that I've seen before include "Niger (anag)" , "Period of a monarchy" , "Rule over in Niger" , "Sit on a throne" , "Monarch's time in the job" .)

I've seen this clue in the Evening Standard.
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