Answer: blackmagic

AnswerCrossword Clue
BLACKMAGICSorcery
BLACKMAGICMystic art in tune of '40s.
BLACKMAGIC"That old ... . . . "
BLACKMAGICInvocation of devils.
BLACKMAGICWitchcraft
BLACKMAGICOccult art
BLACKMAGICVoodoo
BLACKMAGICBad spelling?
BLACKMAGIC"That old" stuff of song
BLACKMAGICArt that uses curse words?
BLACKMAGICNecromancy
BLACKMAGICBad spells