Croon etc creating classical piece (8)
I believe the answer is:
concerto
'classical 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 not sure about the 'classical' bit.
'croon etc creating' is the wordplay.
'creating' is an anagram indicator.
'croon'+'etc'='croonetc'
'croonetc' is an anagram of 'CONCERTO'.
Can you help me to learn more?
(Other definitions for concerto that I've seen before include "Musical piece for soloist(s) and orchestra" , "Composition for accompanied soloist" , "Composition for orchestra in several movements" , "Musical work" , "Solo/orchestra piece" .)