Bad luck for those said to be sound performers (6)
I believe the answer is:
hoodoo
'bad luck' is the definition.
(type of jinx or bad luck)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for hoodoo that I've seen before include "bringer of misfortune" , "Bad luck some people bring" , "Jinx" , "Fetish - charm with magical powers" , "Spells" .)