He is held back by more audacious viewer (8)
I believe the answer is:
beholder
'viewer' is the definition.
(thesaurus)
'he is held back by more audacious' is the wordplay.
I cannot quite understand how this works, but
'he' could be 'der' and 'der' is found within the answer.
'is' could be 'be' and 'be' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for beholder that I've seen before include "Observer" , "Onlooker" , "Some looker" , "One who observes" , "Witness" .)