Bold sound of operatic cycle in German (6)
I believe the answer is:
daring
'bold' is the definition.
(I've seen this before)
'sound of operatic cycle in german' is the wordplay.
'sound of operatic cycle in' becomes 'darin' (I can't explain this - if you can you should believe this answer much more).
'german' becomes 'g' (abbreviation).
'darin'+'g'='DARING'
Can you help me to learn more?
(Other definitions for daring that I've seen before include "Adventurous courage" , "Venturesome" , "Courageous" , "Risque" , "Bold, willing to take chance" .)