The art of making notes (5)
I believe the answer is:
music
This clue might be a double definition.
'the art' is the first definition.
(music is a kind of art)
'making notes' is the second definition.
'music' can be an answer for 'notes' (musical notes). I'm not sure about the 'making' bit.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for music that I've seen before include "being confined by bars?" , "Sonic art" , "Audible art form ..." , "Airs" , "Pleasing sounds" .)