Crossword Genius

Sharks get long-tailed birds (9)

Ross

I believe the answer is:

thrashers

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

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

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

Can you help me to learn more?

(Another definition for thrashers that I've seen is " They flog".)

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