Possible Clues:

• Surely never heard between setter and solver?
• Puzzle (for the intelligent)
• What this is may lead to 17 across
• Double ___ play
• Such as this may express anger
• This is what makes one so angry, in a manner of speaking (9)
• A display of lights
• This is one that's said to be angry
• Cruciverbal test
• Such as this may be spoken in anger