Possible Clues:

• Legal hunting period
• Time to hunt
• Prime hunting time
• Frank Spring is killing time on the estate
• When one may have a shot at getting close to a sailor boy
• Period when criticism might pour in, and a hint to the words that bookend the starred clues' answers
• Play first game of new campaign: anyone could be opposition here
• When game may be shot
• Period of unrestrained criticism
• Period of attack