Crossword Genius

Most solvers will sort out these little beasts (5)

Ross

I believe the answer is:

voles

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

'beasts' is the definition.
The definition and answer can be both animals as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for voles that I've seen is " Mouse-like rodents found in fields and meadows".)

I've seen this clue in the Evening Standard.
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