Fear doctor with notes (5)
I believe the answer is:
dread
'fear' is the definition.
(I know that fear can be written as dread)
'doctor with notes' is the wordplay.
'doctor with' becomes 'dre' (I can't justify this - if you can you should give a lot more credence to this answer).
'notes' becomes 'ad' (two musical notes).
'dre'+'ad'='DREAD'
Can you help me to learn more?
(Other definitions for dread that I've seen before include "Get cold feet" , "Deep fear" , "Apprehensive fear" , "Terrible fear" , "Adder (anag)" .)