Partition or divider (6)
I believe the answer is:
screen
This clue is a double definition.
'partition' is the first definition.
(I know that screen is a type of partition)
'divider' is the second definition.
(I know that screen is a type of divider)
(Other definitions for screen that I've seen before include "Divider to select for suitability." , "Shield - broadcast" , "Surface for projection of pictures" , "show on TV" , "Examine carefully to select or eliminate" .)