Composed a serenade with notes cut out (6)
I believe the answer is:
serene
'composed' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for serene that I've seen before include "Peaceful and contented" , "Impassive" , "Peaceful and unruffled" , "Calm, peaceful, tranquil" , "Totally unagitated" .)