Old scrawl's deciphered with unparalleled skill (5-5)

I believe the answer is:

world-class

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

'unparalleled skill' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'old scrawl's deciphered' is the wordplay.
'deciphered' is an anagram indicator (I've seen this in other clues).
'old'+'scrawls'='oldscrawls'
'oldscrawls' with letters rearranged gives 'WORLD-CLASS'.

'with' acts as a link.

Can you help me to learn more?

I've seen this clue in The Everyman puzzle in The Observer.

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