Possible Clues:

• Shofar
• It's blown on Yom Kippur
• What a shofar is usually made from
• What the musical instrument known as a shofar is typically made from
• What a shofar is typically made from
• Trumpet message that sheep-shearing has occurred?
• Instrument a.k.a. 'shofar'
• Trumpet Australian clipper's result?