Related Clues:

• Middle of a mensis
• Strictly speaking
• Namely
• Stammerer's phrase
• That is
• X ___ xylophone
• To be specific
• Midmonth date
• One day in March
• One 13th?
• Monthly occurrence
• Words preceding a clarification
• 'Y'know what ___?'
• March time
• April 13, e.g.