Possible Clues:

• Room designer
• On vacation, dance with Conservative speaker who might get plastered?
• Painter, wallpaper hanger
• Painter, e.g.
• Handyman who speaks at Xmas time?
• A short month before Speaker becomes a moderniser of the House?
• Cosmetic specialist and doctor are in trouble
• Person who paints and papers
• Domestic worker and Christmas speaker?
• When, in short, 17 down comes, his speech will not make things plain