Related Clues:

• It's open to let one down
• Do the things go down it to the little building in it?
• By the sound of it, fire your gun on the way down
• It's inclined to let things run
• It's open for this to break one's fall
• It's inclined to fire one, by the sound of it, through the Channel
• It's terrifying if it won't open
• Laundry drop
• Water slide feature
• Fall breaker
• Bobsledding track
• Sound of fire in the channel
• Channel for cast to broadcast
• Inclined channel for rubbish, laundry etc
• Sloping trough