Answer:

WIZARD

Answer	Crossword Clue
WIZARD	Dumbledore, for one
WIZARD	Hogwarts alumnus
WIZARD	Software helper

WIZARD	Necromancer
WIZARD	"Taxi Driver" role
WIZARD	Pooh Bah of Oz
WIZARD	Sorcerer
WIZARD	Oz man.
WIZARD	Genius.
WIZARD	Sorceror
WIZARD	Oz V.I.P.

WIZARD	Magician
WIZARD	Harry Potter, for one
WIZARD	Person with a conical hat, maybe
WIZARD	... of Menlo Park (Thomas Edison)
WIZARD	Man with a staff and conical hat
WIZARD	Spell checker?
WIZARD	Hogwarts graduate