Virtuoso finished with teacher (10)

I believe the answer is:

pastmaster

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'virtuoso' is the definition.
I know nothing about this answer so I can't judge whether this works.

'finished with teacher' is the wordplay.
'finished with' becomes 'past' (past can mean forgotten or finished).
'teacher' becomes 'master' (I've seen this before).
'past'+'master'='PASTMASTER'

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(Other definitions for pastmaster that I've seen before include "Old hand" , "Expert" .)

I've seen this clue in The Daily Express.

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