Perfect example of rock Sixties youth'll broadcast (4,5)
I believe the answer is:
role model
'perfect example' is the definition.
(a role model sets a good example)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for role model that I've seen before include "One's imitated" , "One worthy of imitation" , "example for kids" , "One imitated by others" , "Paragon" .)