Possible Clues:

• Girl given something "not just for Christmas" turning unenthusiastic
• Half-hearted council holds money back
• Edward keeps relationship lukewarm
• Back 'Day One,' the favourite but not a very hot one
• Unenthusiastic about parliament's reception of president
• It's not so hot for the pet to get up here before I would
• Not very warm (water)
• Unenthusiastic and unruly youth penning letter
• Half-hearted fellow without character of Greeks
• Come back, dear, one day when it's warm