Answer: indisguise

AnswerCrossword Clue
INDISGUISEKeeping a low profile
INDISGUISELike Sherlock Holmes, sometimes
INDISGUISEMasked, say
INDISGUISEWearing a false mustache, say
INDISGUISEWearing a costume, say
INDISGUISELike attendees at a masquerade party
INDISGUISEAt a costume party, maybe