Possible Clues:

• Twitter forwards, on Twitter
• Shares again on Twitter, briefly
• Some footballers: Abbr.
• ACLU concerns, for short
• ACLU issues: Abbr
• They protect 58-Down
• Shares on Twitter, informally
• The ACLU works to protect them: Abbr.
• They may get waived: Abbr.
• Defensive linemen: Abbr.