Related Clues:

• Font feature
• Line on a letter
• The letter O doesn't have one
• Punctuation in ''patty-cake''
• Top-row key
• What the letter O lacks
• Letter finisher
• Sans-___ (typeface type)
• Type feature
• Font decoration
• Sans -- (font type)
• Helvetica's lack
• Stroke on a letter
• Letter fancifier
• Big-time connection?