Possible Clues:

• Greek personification of darkness
• Place that was hellish before getting public transport
• Mt. -, Antarctic volcano; be sure (anag.)
• Before you get transport to get you down
• Cavern on the way to Hades
• Darkness to be traversed, before getting public transport?
• Is there e'er the sound of a car down there?
• To hell with a mixture of beer for you and me
• Mt. ___ (world's southernmost active volcano)
• It's hellish dark before boat returns