Crossword Genius

Beastly disease classy lady keeps back (5)

Ross

I believe the answer is:

lyssa

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'beastly disease' is the definition.
The definition suggests a singular noun which matches the answer.

'classy lady keeps back' is the wordplay.
'keeps' indicates a hidden word.
'back' says the letters should be written backwards.
'assyl' is hidden within 'classy lady'.
'assyl' backwards is 'LYSSA'.

Can you help me to learn more?

(Another definition for lyssa that I've seen is " rabies".)

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