Related Clues:

• Person who should know
• Single item
• ''One Adam Twelve,'' e.g.
• Military assignment
• Rental space
• Single thing
• Knot or watt
• Ton, for one
• Collegian's credit
• Constituent of a whole
• Family ___
• Segment covered by a test, perhaps
• One piece of a sectional sofa
• See 61-Across
• Kitchen fixture