Covering for a curtain rod (6)
I believe the answer is:
pelmet
'covering for a curtain rod' is the definition.
This is the entire clue.
(Other definitions for pelmet that I've seen before include "Strip to conceal curtain fixtures" , "ornamental drapery" , "Ornamental strip above window to conceal curtain rail" , "Narrow border across top of window" , "Temple (anag)" .)