Related Clues:

• Varsity member's prize
• With 9-Across, post office mail slot ... or a hint to this puzzle's theme
• Love __
• 'Sesame Street' sponsor?
• Global communications device
• Red ____ day
• Alphabet soup bit
• An alphabetic unit
• Written message
• Unit of alphabet
• A written message
• Character of the alphabet
• A written form of communication
• This sounds as if it might allow 'er to be a male
• This might allow `er to be male, by the sound of it