Crossword Genius

Mythical female imitating Cilla (6)

Ross

I believe the answer is:

scylla

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'mythical female' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?

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

Can you help me to learn more?

(Other definitions for scylla that I've seen before include "danger to shipping" , "Mythical sea monster" , "Charybdis counterpart" , "Peril with Charybdis" , "Rock, across from 21" .)

I've seen this clue in the Evening Standard.
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