Expression of wonder about note a sure thing in virtuoso piece (8)
I believe the answer is:
concerto
'virtuoso piece' is the definition.
'concerto' can be an answer for 'piece' (I have seen 'Orchestral piece' mean 'concerto' so perhaps 'piece' could also mean 'concerto'). I'm unsure of the 'virtuoso' bit.
'expression of wonder about note a sure thing' is the wordplay.
'expression of wonder' becomes 'coo' (I can't justify this - if you can you should give a lot more credence to this answer).
'about' means one lot of letters goes inside another.
'note' becomes 'n' (abbreviation).
'a sure thing' becomes 'cert' (I've seen this before).
'n'+'cert'='ncert'
'coo' going around 'ncert' is 'CONCERTO'.
'in' is the link.
Can you help me to learn more?
(Other definitions for concerto that I've seen before include "Work for orchestra and soloist(s)" , "Composition for accompanied soloist" , "Musical composition" , "Orchestral composition" , "10 [COMPOSITION]" .)