Letter attachment?

• Mark in the intersection of 58-Across and 43-Down
• François's diacritic
• Pronunciation aid
• Every garГ§on has one
• Mark at bottom of letter: "Edward has to wear black"
• A diacritical mark (,) placed below the letter c to indicate that it is pronounced as an s
• Mark suggesting a 'c' should be pronounced an 's'

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
c.1600, from Spanish cedilla , zedilla , literally "little z," from a Latin-like diminutive of Greek zeta "the letter 'z'." The mark (formerly also used in Spanish) was derived from that letter and indicates a "soft" sound in letters in positions where ...

Wikipedia Word definitions in Wikipedia
A cedilla ( ; from Spanish ), also known as cedilha (from Portuguese) or cédille (from French), is a hook or tail ( ¸ ) added under certain letters as a diacritical mark to modify their pronunciation. In Catalan , French , and Portuguese , it is used only ...