Crossword Genius

Colston is toppled - such people promoted imperialism (9)

Ross

I believe the answer is:

colonists

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

'people promoted imperialism' is the definition.
I can't tell whether this definition defines the answer.

'colston is toppled' is the wordplay.
'colston is' can be anagrammed to 'COLONISTS'.
However, I'm unsure how this is indicated.

'such' is the link.

Can you help me to learn more?

(Another definition for colonists that I've seen is " new arrivals".)

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