Answer:

masked

Answer	Crossword Clue
MASKED	Like Batman or Robin
MASKED	Kind of ball
MASKED	"Who was that ... man?"

MASKED	At a costume ball, say
MASKED	Like Catwoman, e.g.
MASKED	Wearing a disguise, perhaps
MASKED	Disguised.
MASKED	Concealed.
MASKED	Hidden.
MASKED	Disguised
MASKED	Like Batman and Robin

MASKED	Like raccoons
MASKED	Like Batman, the Lone Ranger, etc.
MASKED	Incognito, maybe
MASKED	Concealed
MASKED	Disguised, in a way
MASKED	Like some party guests
MASKED	Disguised as Batman and Robin
MASKED	Hidden

MASKED	Like Zorro
MASKED	Like many a trick-or-treater