Possible Clues:

• Before one gets to the bus it's gone to Hades
• Cavern on the way to Hades
• Is there e'er a bit of public transport to get you down there?
• Before transport will get you down
• This can be sure before the transport goes underground
• Be sure to get down there before the transport
• Is there e'er a bit of transport down there?
• Make it a beer with us down here
• Before it's at the top it gets transport down below
• Have a beer with us below there