Related Clues:

• Become excited
• "Avoid using the expression '___' ..."
• Have a cow, so to speak
• Come undone
• Flip one's lid!
• Lose it, and a hint to the last words of 18-, 27-, 48- and 63-Across
• Lose one's cool, having to extend a hand, perhaps
• Get very annoyed when fruit is on the turn
• Be extremely excited by game with hands
• Pineapple chunk appears first - lose it
• Crack crackers and become very angry
• Flip trap with pineapple
• Throw a wobbly, say, over imprisoning pensioner
• Find chunk with pineapple — or lose it?
• Become crazy and take shot at primate