Crossword puzzle clue "'that'sknow '"

Recent crossword clues

• Helps in crime View answers
• Alternative handle View answers
• One who settles arguments View answers
• Kind of vinegar View answers
• Site of many changes View answers
• Hoboken's area code, in ancient Rome (I realize this clue is preposterous, laugh with/at me) View answers
• Frequent college funding source View answers
• Odd View answers
• Author of the "Elements," ca. 300 B.C. View answers
• It has an iris, a cornea, and a pupil View answers