Possible Clues:

• Seethe a short way into series
• Cool off, with ''down''
• Nearly boil
• Seethe as whiskey taken from bather?
• Put on low, in a way
• Cook in no hurry as dieter losing pound
• Seethe with one of the cards off nice beach
• Cook gently allowing weight-conscious person to lose pound
• Smart of one on a diet to lose pounds
• Boil slowly at low temperature