Related Clues:

• "C" on a calculator
• Boom box feature
• Air condition?
• Unambiguous
• Slice of a media ad budget, often
• Shortwave medium
• Woody Allen's "___ Days"
• Like good explanations
• The R in NPR
• AM/FM appliance
• Dashboard appliance
• Medium for F.D.R.'s speeches
• Transistor, e.g.
• Weather forecast, at times
• Depression-era cathedral