Answer: sitinon

AnswerCrossword Clue
SITINONAudit, as a class
SITINONAudit, as a college course
SITINONAudit
SITINONAttend.
SITINONJoin, as a meeting
SITINONAudit a course
SITINONAttend as a visitor
SITINONTake for no credit