Magical charm (4)
'magical charm' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for talisman that I've seen before include "Object believed to have magical powers" , "Object supposed to bring good luck" , "Mascot" , "bringer of luck?" , "It's thought to be a magical protection against evil or disease" .)
(Other definitions for mojo that I've seen before include "Magical influence" , "Magic charm or power in African-American culture, as heard in R&B music" , "American charm" , "Magical power" .)