Magician's word (11)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
abracadabra
(Other definitions for abracadabra that I've seen before include "it's said, for a spell" , "Word from a prestidigitator!" , "Word used by conjuror" , "Magic word used by conjurors" , "Magical incantation" .)