Old-fashioned and extremely unusual French solo dance (3,4)

I believe the answer is:

pas seul

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'french solo dance' is the definition.
'pas seul' can be an answer for 'dance' (pas seul is a kind of dance). I am unsure of the 'french solo' bit.

'old-fashioned and extremely unusual' is the wordplay.
'old-fashioned' becomes 'passe' (synonyms).
'and' is a charade indicator (letters next to each other).
'extremely' means to remove the middle letters (only the extremes of the word are used).
'unusual' with its centre taken out is 'ul'.
'passe'+'ul'='PAS SEUL'

Can you help me to learn more?

(Other definitions for pas seul that I've seen before include "dance movement" , "dance without partner" , "Ballet solo" .)

I've seen this clue in The Hindu.

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