Answer: gowns

AnswerCrossword Clue
GOWNSThey might come with trains
GOWNSFormals.
GOWNSDresses
GOWNSEvening wear
GOWNSFrocks
GOWNSCampus costumes
GOWNSHabits of a sort
GOWNSProm needs
GOWNSProm apparel
GOWNSGraduation attire
GOWNSBall coverings?
GOWNSRed-carpet interview topics
GOWNSThings to wear.
GOWNSGraduation-day garb
GOWNSThey flow in the evenings?
GOWNSGraduation outfits
GOWNSBall attire
GOWNSDebutantes' wear
GOWNSMany flow in the evenings
GOWNSSoiree wear
gownsloose robe worn by judges, the clergy, etc.
gownswoman's formal dress
gownsGOWN, to dress in a gown (a long, loose outer garment)
GOWNSThey often have matching caps
GOWNSGraduates' garb
GOWNSEmeriti's garb
GOWNSWedding dresses
GOWNSFancy dresses
GOWNSGarb for grads
GOWNSProm sights
GOWNSProm dresses
GOWNSBeauty pageant garb
GOWNSFormal frocks
GOWNSSome Miss America Pageant garments
GOWNSCaps' partners
GOWNSDoc's outfits
GOWNSBall dresses
GOWNSAcademic robes
GOWNSProm wear
GOWNSSome formal wear