Possible Clues:

• Period in which ringleader's imprisoned as part of sentence
• Idiomatic expression gets worn at the edges, so to speak
• Seraph's strange group of words
• Passage of music from composition in E sharp
• Sentence unit
• Catchword wears thin on the radio
• Coined thing
• Many an Urban Dictionary entry
• He raps out a few words
• Piece of text, perhaps ruined when one page is removed