Answer: idigress

AnswerCrossword Clue
IDIGRESSAcknowledgement of a deviation, usually after "but"
IDIGRESSWords from someone who's gone off on a tangent
IDIGRESS"Excuse me for going off-topic"
IDIGRESS"There was a point here somewhere"
IDIGRESSOff-topic remark?
IDIGRESSAdmission of a tangent