Having one for music, you get the notes right (3)
I believe the answer is:
ear
'having one for music' is the definition.
I can't judge whether this definition defines the answer.
'get the notes right' is the wordplay.
'get' says to put letters next to each other.
'the notes' becomes 'ea' ().
'right' becomes 'r' (abbreviation).
'ea' next to 'r' is 'EAR'.
'you' acts as a link.
Can you help me to learn more?
(Other definitions for ear that I've seen before include "Head of grain" , "Lend one and listen" , "Shell-like; corn" , "Lughole" , "Hearing aid?" .)