Possible Clues:

• Equals version of what informer will do
• Confess (under pressure?)
• Strident cry from marine mammal? Without question
• Cry from main cavalcade essentially surrounding queen
• Make a noise like a pig
• Shrill cry of ecstasy in brief storm
• Cry — snitch
• Piglet's cry
• Inform on someone
• Gangster with sons in Paris that give the game away