Related Clues:

• Go by the green when not driving
• 15 across may have one
• Traveller in a vehicle, not the driver
• Mover on a board
• Facebook currency
• Symbolic presence granted to Livingstone
• Mere show of approval interrupting number
• Certainly in time to obtain souvenir
• Hand green form to traveller
• Excuse for not doing things thoroughly, addressed to London mayor
• One is apt to be driven
• No driver may proceed on change to green
• Weak team member transferred by coach, perhaps
• See 31
• Reminder for several to keep agreement