Made notes with no signs of worry (8)
I believe the answer is:
composed
'made' is the definition.
(composing is a kind of making)
'notes with no signs of worry' is the wordplay.
I cannot really understand how this works, but
'notes' could be 'ed' and 'ed' is found in the answer.
'no' could be 'o' (O resembles 0) and 'o' is located in the answer.
'of' could be 'o' and 'o' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for composed that I've seen before include "Made a score" , "What poet did" , "What Gershwin did" , "Calm and collected" , "arranged" .)