Possible Clues:

• Glowing remains
• Dying fire bits
• For ones in society to have lost a thousand makes them heated (6)
• Remains of coal fire
• There's something smouldering in 'September Song'
• They're smouldering in 'September Song'
• How those in society have lost their heads and become so heated
• Those in 10 across, for instance, have lost their head and become heated (6)
• Vestiges of fire at the ends of winter months
• Membership embraces the Ashes