Related Clues:

• Secured
• Under way
• Under control
• Bird's position?
• Under one's control
• Being controlled
• Under one's command
• In the process of being dealt with
• The mixture of air, perhaps, that is going by rail in an ongoing sort of way
• Matters have got going by rail, it seems
• Proceeding by rail?
• Ongoing by rail
• That's where it could be air that's going ahead by rail
• Where it's on the cards it's under control
• Dealt with what one is working on