Pen music, rondo needing change, sounding wrong (13)
I believe the answer is:
mispronounced
'sounding wrong' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives can sometimes mean the same thing.
'pen music rondo needing change' is the wordplay.
'needing change' indicates an anagram (I've seen 'needs changing' mean this (I've seen this in other clues)).
'pen'+'music'+'rondo'='penmusicrondo'
'penmusicrondo' with letters rearranged gives 'MISPRONOUNCED'.
Can you help me to learn more?
(Another definition for mispronounced that I've seen is " Said (a word) wrongly".)