Related Clues:

• Slim Whitman, e.g.
• One calling at peak times?
• The lonely goatherd, in a 'Sound of Music' song
• Caller from high
• Matterhorn vocalist
• Singer in the Alps
• Cowboy crooner, at times
• Singer heard in the Cliff Hangers game on "The Price Is Right"
• Alpine vocalist
• Producer of high and outside pitches?
• Alpine singer, perhaps
• Jimmie Rodgers or Tex Owens, musically
• Peak performing singer for do turning into screamer
• Vocalist in America greeting famous countertenor
• Alpine warbler