Related Clues:

• N.Y.C. subway manager
• Afternoon hour
• King Cole's fiddlers, e.g.
• See 15-Across
• 1959 pop/folk hit
• Perpetual time on the clock at Independence Hall
• Small number
• Not many
• Kingston Trio hit
• N.Y.C. subway inits.
• III
• DEF, on a phone
• Word that precedes six other answers in this puzzle
• Boston subway inits.
• Low digit