Popular champion throwing kid jokily into the air (7)
I believe the answer is:
tribune
'popular champion' is the definition.
(I've seen this before)
'kid jokily into the air' is the wordplay.
'kid jokily' becomes 'rib' (to rib someone is to tease or kid them).
'into' means one lot of letters goes inside another.
'the air' becomes 'tune' (air can mean a piece of music).
'rib' inserted inside 'tune' is 'TRIBUNE'.
'throwing' is the link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for tribune that I've seen before include "Roman legionnaire" , "Champion of the people" , "Official upholder of the people's rights" , "basilica" , "Roman people's official" .)