Possible Clues:

• Instrument for strategic planner around house
• It's highly effective for summoning cattle in Switzerland
• Instrument Al Gore keeps to compose
• Swiss herder's instrument
• It's blown by planner altering exterior of house
• This instrument of Austria and Switzerland inspired a theme in the finale of Brahms’s first symphony
• Might one be blown till the cows come home?
• Lengthy item calling to the lower house: planner upset about that
• Instrument on plane, extremely rough in motion?
• The instrument imitated in the “ranz des vaches” section of Rossini’s William Tell overture