Crossword Genius

Little bets on quivers (8)

Ross

I believe the answer is:

flutters

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'quivers' is the definition.
(I know this)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for flutters that I've seen before include "bats" , "Small bets; flaps" , "Moves like a butterfly, towardsthe bookies?" , "23 [BETTER] has" .)

I've seen this clue in the Sydney Morning Herald.
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