Possible Clues:

• Window cleaner
• Understand about queen's surprised remark to cleaner
• Window washer's tool
• Rubber-edged gizmo for cleaning windows
• Tool with a blade
• Cleaner figure halved for ease, it's said, good to enter
• Picture, framing one with many subjects almost good, cleaner
• Cleaning implement in Paris that, say, gets into clock
• Film attacker?
• Rubber-edged too, for cleaning windows say