Possible Clues:

• Pick of the leader?
• Cross time for the over eighteens
• A competition by ballot
• A vote to select
• Choosing a government building that's left for queen
• It's a choice sort of lice that infests Eton
• In general, this may lead to a change in the house
• An act of democracy
• Generally its participants make one cross
• Vote for anthology with no introduction