Kind of anthem: timelessly fresh and intrinsically universal (6)
I believe the answer is:
humane
'kind' is the definition.
(similar in meaning)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for humane that I've seen before include "sort of killer" , "Characterised by kindness" , "Kindly and compassionate" , "Kind - compassionate" , "Kindly or merciful" .)