Answer: hip

AnswerCrossword Clue
HIPLike jazz fans, stereotypically
HIPHula Hoop spinner
HIPNot at all nerdy
HIPStart of a cheer
HIPFanny pack spot
HIPOft-replaced joint
HIPOne of a swiveled pair
HIPCommon surgical replacement
HIP"Hooray!" preceder, when repeated
HIP...-hop
HIPExuding coolness
HIPMod
HIPSwinging
HIPUp on the latest
HIPAu courant
HIPHooray lead-in
HIPCheer leader?
HIPNot square
HIPStreet-smart
HIPJoint at the top of the femur
hipto build a type of roof / aware of the latest styles and trends
HIPHaunch
HIPWise
HIPAware of what's what
HIPCool
HIPSavvy
HIPTrendy
HIPNickname of Nintendo music composer Hirokazu Tanaka
HIPIn the know
HIPWord of cheer
HIPKind of boots
HIPCheer starter
HIPWith it
HIPAware
HIPSyllable in cheers
HIPHolster's place
HIPPager's place
HIP... flask (liquor container)
HIPOft-swiveled joint
HIPSwinging joint?