Old listing of characters involved in apartheid (3,6)
I believe the answer is:
hit parade
'old listing' is the definition.
(former listing of hit songs)
'characters involved in apartheid' is the wordplay.
'characters involved in' indicates an anagram (the same characters in a different order).
'apartheid' anagrammed gives 'HIT PARADE'.
'of' acts as a link.
(Other definitions for hit parade that I've seen before include "list of winners" , "Selling CDs" , "Those once charting" , "Pop charts" , "Top-selling numbers" .)