Crossword Genius

Beautiful woman sounding alarm (5)

Ross

I believe the answer is:

belle

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This could be a double definition.

'beautiful woman' is the first definition.
(I've seen this before)

'sounding alarm' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

Can you help me to learn more?

(Other definitions for belle that I've seen before include "Girl who's fetching" , "dish" , "Reigning beauty" , "Beautiful woman - of the ball?" , "Beautiful female" .)

I've seen this clue in The Daily Express.
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