Related Clues:

• Beginning for "lateral"
• Valve opening?
• Single at the beginning?
• One-third of ''tri-''
• One of six in this puzzle
• It's less than stereo
• College, casually
• Prefix for rail
• Like most pre-'60s recordings
• Mono's cousin
• Start for sex or corn
• "Bi" halved?
• Single opening?
• A third of tri-
• Place of higher education