Answer: bikinitop

AnswerCrossword Clue
BIKINITOPHalter, perhaps
BIKINITOPTwo-piece piece
BIKINITOPPart of a two-piece suit
BIKINITOPSuit part
BIKINITOPCause of some tan lines
BIKINITOPTwo-piece part
BIKINITOPIt wraps around a chest at the beach