Sinuous slave dance (5)

I believe the answer is:

valse

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

'sinuous slave dance' is the definition.
'valse' can be an answer for 'dance' (valse is a kind of dance). I am not certain of the 'sinuous slave' bit.

'slave dance' is the wordplay.
'dance' is an anagram indicator.
'slave' is an anagram of 'VALSE'.

Can you help me to learn more?

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

I've seen this clue in The Globe and Mail.

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