Successfully learn short musical work, an outstanding creation (11)
I believe the answer is:
masterpiece
'an outstanding creation' is the definition.
'masterpiece' can be an answer for 'creation' (masterpiece is a kind of creation). I'm unsure of the 'an outstanding' bit.
'successfully learn short musical work' is the wordplay.
'successfully learn' becomes 'master' (as in mastering a skill).
'short musical work' becomes 'piece' (piece of music).
'master'+'piece'='MASTERPIECE'
Can you help me to learn more?
(Other definitions for masterpiece that I've seen before include "Outstanding artwork" , "Outstanding item of workmanship" , "Work of extreme skill" , "Work of outstanding artistry" , "tour de force" .)