Crossword Genius

Braless predators of South America? Huge number! (8)

Ross

I believe the answer is:

zillions

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

'braless predators' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'of south america? huge number' is the wordplay.
I cannot quite understand how this works, but
'of' could be 'o' and 'o' is located in the answer.
'south' could be 's' (abbreviation) and 's' is located in the answer.
'number' could be 'l' (L is an example) and 'l' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for zillions that I've seen before include "Trillions and trillions" , "fantastic crowds" .)

I've seen this clue in The Telegraph.
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