Crossword Clue:

A person or thing inseparable from another

AnswerCrossword Clue
THELIKEPerson or thing similar to another
IDOLPerson or thing with a following
ANTITYPEPerson or thing foreshadowed by a preceding one.
NOUNSchoolhouse Rock "A ... is a Person, Place, or Thing"
NOUNSchoolhouse Rock "A ... Is a Person, Place or Thing"
SYMBOLISTPerson who says one thing and means another