Offices without walls (4-4)
I believe the answer is:
open-plan
'offices without walls' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for open-plan that I've seen before include "Buildings with few partitions" , "style in office" , "(Of office) having few dividing walls" , "Offices without walls" , "Office without walls" .)