Related Clues:
- Message, small, delivered in double time
- ... online message from number one in road racing event
- 140-characters-or-less message
- Communicate a little bit in race
- Car-locking sound
- Message that can't exceed 140 characters
- Limited-size post
- With a minimum of tact, little time for message?
- Casual shirt is a bit small for tenor - put that out there
- Hashtag container
- Message conforming to a 140-character limit
- Communicate with 'followers'
- People in general blocking an offensive brief message
- Message with a hashtag
- Message with a hashtag, often