Possible Clues:

• Being regularly culled is important
• Headline-worthy
• Important American soldier returned after onset of battle
• Massive rock turns up
• Cornell athletes
• With 120-Down, Wrigley's gum brand
• With 69-Across, V.I.P
• Of major concern
• For such artillery, protection at the front involves good earthwork
• Word with "cheese" or "bang"