Notes craze (3)
I believe the answer is:
fad
'craze' is the definition.
(synonyms)
'notes' is the wordplay.
I cannot quite see how this works, but
'notes' could be 'fa' and 'fa' is found within the answer.
A single letter 'd' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for fad that I've seen before include "Passing vogue or fashion" , "Affectation" , "A craze or current vogue" , "Personal whim" , "Short-lived craze" .)