Related Clues:

• Allowed nothing to be put over beam
• Upright sidepiece
• 'Beam', part of personnel in Telegraph
• Bishop's squeeze, previously bit on the side?
• Allow nothing to be reflected in window feature?
• Supporting beam over a doorway
• Preserve British entry by post? Au contraire
• Goes around side of hall for the flowerpot
• Son unwell -- one lies horizontally
• Pie perch, perhaps
• Piece under a door
• Doorframe
• When called out, fix part of window frame
• Window box support
• Frame component