Bed linen confused the Southeast (5)
I believe the answer is:
sheet
'bed linen' is the definition.
(I know that sheet is a type of bed linen)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for sheet that I've seen before include "Piece of paper; nautical rope" , "Piece of paper or bedlinen" , "Item of bedlinen" , "One of pair tucked in" , "Mattress cover" .)