Possible Clues:

• Minds
• Mastermind
• They control nervous systems
• Relative from first class goes to school - does that make sense?
• Common sense of supporters drinking at home
• Intellectual capacity (to be picked?)
• Common sense shown by British artist? In spades
• Minds starting 15 across at school
• Mastermind supporters to stay at home
• Minds what's concealed by candelabra in sitting-room