Related Clues:

• Dangerous thing to do while driving
• Linguistic units
• Message former partner during race meeting
• Dictionary entries
• Sermon's basis, often
• "Don't ___ and drive"
• Schoolbook, or much of its contents
• Reserve, as a hotel room
• Thesaurus contents
• Thumb thing to read?
• Many an iPhone message
• Starter for "binding" or "making"
• SMS exchange
• Former partner going inside time after time to use phone?
• Part of a phone plan