Related Clues:

• Slim Whitman, e.g.
• One calling at peak times?
• The lonely goatherd, in a 'Sound of Music' song
• Caller from high
• Singer in the Alps
• Cowboy crooner, at times
• Singer heard in the Cliff Hangers game on "The Price Is Right"
• Alpine vocalist
• Alpine singer
• Producer of high and outside pitches?
• Alpine singer, perhaps
• Jimmie Rodgers or Tex Owens, musically
• Alpine warbler
• One calling from a Swiss mountaintop
• Goatherd, in ''The Sound of Music''