Related Clues:

• It keeps someone under control
• It controls what's left outside the locomotive
• About to teach the others self-control
• In repose practice self-discipline
• Others take exercise in moderation
• No action required about coach reservation
• Restriction, limit
• Prop accepting coach's controlling influence
• Limiting device
• Check made by tutor during break
• Reserve remains with coach, tense to the end
• Control number of carriages allowed in halt
• Self-discipline to take exercise during holiday
• Something that holds back
• Check transport is available during holiday