Crossword Puzzle Autumnal event so called because it helps hunters kill their prey

Clue: Autumnal event so called because it helps hunters kill their prey

Event in southern Italy: A.D. 79 (ERUPTION with 8 letters)
Social event (e.g. AFFAIR with 6 letters)
Trumpeter and bandleader who was called "The Round Mound of Sound" (ALHIRT with 6 letters)
SoHo event (ARTSHOW with 7 letters)
Sotheby's event (AUCTION with 7 letters)
Solar-year event (AUTUMNALEQUINOX with 15 letters)
2011 second-generation Chevrolet also called a Sonic (AVEO with 4 letters)
Palais social event (BAL with 3 letters)
Social event in Paris (BAL with 3 letters)
Sedan social event (BAL with 3 letters)