Answer: footnote

AnswerCrossword Clue
FOOTNOTE

What an asterisk may indicate

FOOTNOTE

Reference citer, in a manuscript

FOOTNOTE

Sound from a shoehorn?

FOOTNOTE
Term-paper reference
FOOTNOTE
Reference below the text.
FOOTNOTETerminal comment.
FOOTNOTEAsterisk material
FOOTNOTEBit of extra reading
FOOTNOTEAdditional comment
FOOTNOTECertain explanation
FOOTNOTEWhere a star might lead?
FOOTNOTEWhere following a star might lead you
FOOTNOTEFact addition
FOOTNOTEAuthor's explanation
FOOTNOTEPrint below the text
FOOTNOTEPodiatrist's memo?