Possible Clues:

• Waxed spill
• Decrease power in adjustment of rate
• Diminish
• Get to the point entering data, perhaps
• Prate (anag) — come to the point?
• Come to a point, as a candle
• Dwindle (down)
• A wax-coated wick used to convey a flame
• One maybe recording hit with Queen
• Get smaller and lighter