Answer: HIPTO

AnswerCrossword Clue
HIPTOIn on
HIPTOWell aware of
HIPTOCognizant of, slangily
HIPTOUp on
HIPTO"... Be Square" (Huey Lewis and the News)
HIPTOAware of, in '60s slang
HIPTOAware of, slangily
HIPTOAware of, to cool cats
HIPTOKnowledgeable about, old-school
HIPTOHuey Lewis and the News tune, "... Be Square"
HIPTOSavvy about
HIPTOKnowing what's what about
HIPTOCognizant of
HIPTOAware of, so to speak
HIPTOIn on, slangily
HIPTOClued in about
HIPTODigging, in a sense
HIPTOConscious of, slangily
HIPTOIn the know about
HIPTOInformed about
HIPTONot in the dark about
HIPTOFamiliar with
HIPTOAware of
HIPTONot ignorant of