Who might be streaming abroad? (9)

I believe the answer is:

emigrants

I'm a little stuck... Click here to teach me more about this clue!

'who might be' is the definition.
I can't tell whether this defines the answer.

'streaming abroad?' is the wordplay.
'abroad?' is an anagram indicator (letters move around or go abroad).
'streaming' anagrammed gives 'EMIGRANTS'.

Can you help me to learn more?

(Other definitions for emigrants that I've seen before include "They leave home for St Germain" , "People leaving their home in St Germain" .)

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