Anybody can be exemplary! (3)
I believe the answer is:
one
'anybody' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for one that I've seen before include "joke" , "Unity" , "Single and undivided" , "I can mean this" , "Single person or thing" .)