Musical sound held by piano teacher (4)
I believe the answer is:
note
This could be a double definition.
'musical sound' is the first definition.
'note' can be an answer for 'sound' (thesaurus). I'm not sure about the 'musical' bit.
'held by piano teacher' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for note that I've seen before include "Memo - sound - fame" , "Observe - musical symbol" , "Musical tone" , "Make a record of" , "Observe, record" .)