Dutch uncle only bold... (9)
I believe the answer is:
dauntless
'bold' is the definition.
(similar in meaning)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for dauntless that I've seen before include "Invulnerable to fear" , "Resolute" , "Intrepid" , "Boldly undeterred" , "Brave" .)