Related Clues:

• Sign up for
• Link up
• Sign up with
• Sign, as a contract
• Fall in with
• Make connections
• Enroll in
• Participate
• Join, as a partnership
• Travel with
• Take part in, conversation or agreement
• Begin to have nothing to do with the outcome
• You can't get out of it - you've got to take part
• Hop on the bandwagon
• Add one's voice to others