Notes elected to be loyal (7)
I believe the answer is:
devoted
'loyal' is the definition.
(similar in meaning)
'notes elected' is the wordplay.
'notes' becomes 'de' (two musical notes).
'elected' becomes 'voted' (I've seen this before).
'de'+'voted'='DEVOTED'
'to be' acts as a link.
(Other definitions for devoted that I've seen before include "Dedicated or wholly given up to" , "Strongly attached (to)" , "Loving and loyal" , "Faithful" .)