Switches pepper in table's mill for covers (8)
I believe the answer is:
blankets
'covers' is the definition.
(blanket is a kind of cover)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for blankets that I've seen before include "Warm bedding" , "Bed coverings" , "Bed covers" , "Covers everything like bedclothes" , "Ben talks about the bedclothes" .)