Answer: alterego

AnswerCrossword Clue
ALTEREGO

Clone?

ALTEREGO

Hyde, to Jekyll

ALTEREGO

Batman, for Bruce Wayne

ALTEREGO
Intimate confidante
ALTEREGO
Green Hornet, to Britt Reid
ALTEREGOLiterally, "other self"
ALTEREGOOswald Cobblepot, vis- -vis The Penguin
ALTEREGOSuperhero's cover
ALTEREGOBruce Wayne, to Batman, e.g.
ALTEREGOClark Kent, to Superman
ALTEREGOVery close friend
ALTEREGODrag name, for example
ALTEREGOBruce Wayne, for Batman
ALTEREGOClark Kent, for one
ALTEREGOSecond self
ALTEREGOBruce Wayne, for one
ALTEREGOHalf a superhero's identity
ALTEREGOSpider-Man, for Peter Parker
ALTEREGOPart of many a superhero's life
ALTEREGOJekyll, vis- -vis Hyde
ALTEREGOInseparable friend
ALTEREGOPeter Parker, for one
ALTEREGOOne's other self.
ALTEREGOMr. Hyde to Dr. Jekyll.
ALTEREGOBosom friend.
ALTEREGOConstant companion.
ALTEREGOA very close friend.
ALTEREGOA second self.
ALTEREGOClose companion.
ALTEREGOBoon companion.
ALTEREGOOne's double.
ALTEREGOVery close friend.
ALTEREGOConfidant.
ALTEREGOOther self
ALTEREGOA second self
ALTEREGOPerfect deputy
ALTEREGOTrusted friend
ALTEREGOOther I
ALTEREGOSecond shelf
ALTEREGOMr. Hyde, e.g.