One down alley dancing in a stylish manner (9)

I believe the answer is:

elegantly

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'one down alley dancing in a' is the definition.
I can't judge whether this definition defines the answer.

'stylish manner' is the wordplay.
'stylish' becomes 'elegant' (both can mean fancy or ornate).
'manner' becomes 'ly' (I can't justify this - if you can you should believe this answer much more).
'elegant'+'ly'='ELEGANTLY'

Can you help me to learn more?

(Other definitions for elegantly that I've seen before include "Gracefully, stylishly" , "In a graceful and stylish manner" , "Ingeniously" , "Gracefully and tastefully" , "in a debonair way" .)

I've seen this clue in The Independent.

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