One French composer will sort out the mystery (7)

I believe the answer is:

unravel

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'sort out the mystery' is the definition.
I can't judge whether this defines the answer.

'one french composer' is the wordplay.
'one' becomes 'un' (northern English dialect form of 'one').
'french composer' becomes 'Ravel' (Maurice Ravel).
'un'+'ravel'='UNRAVEL'

'will' is the link.

Can you help me to learn more?

(Other definitions for unravel that I've seen before include "Become undone" , "Disentangle or undo like knitted fabric" , "Make sense of" , "Solve the problem" , "Come undone; solve" .)

I've seen this clue in the Evening Standard.

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