Ravel's waltz? Perhaps not initially (5)

I believe the answer is:

valse

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

'ravel's waltz?' is the definition.
'valse' can be an answer for 'waltz?' ('valse' can be a synonym of 'waltz'). I am not sure about the 'ravel's' bit.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for valse that I've seen before include "Dance" , "Steps taken in France" .)

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