Possible Clues:

• Narrow boat's stern squashing impressionist?
• Pre-bulb lighting, perhaps
• Prate wildly, but come to the point
• He recorded hit by Queen
• Get narrow gradually
• Just a little light turn about an Irishman
• Get thinner towards the end
• Flare's antithesis as source of light
• Reduce gradually
• Narrow gradually as candle may