Related Clues:

• Moral, generally
• Research project
• Check in
• SAT part
• Tell what you've seen
• Editorial piece
• Tutoring unit
• Explosive noise
• Written analysis
• Short news account
• Treatise
• Where you may find the ends of 17-, 23-, 52- and 63-Across
• Personal prose unit
• Test section, often
• Op-Ed article