White chairs partially with designs using steel, glass and plastic, say (2-4)
I believe the answer is:
hi-tech
'with designs using steel glass and plastic say' is the definition.
(steel, glass and plastic are modern materials)
'white chairs partially' is the wordplay.
'partially' indicates a hidden word.
'HI-TECH' can be found hidden inside 'white chairs'.
(Other definitions for hi-tech that I've seen before include "Involving the latest electronic gadgetry" , "Sophisticated electronics" , "Advanced technology" , "(Using) the latest developments" , "Using the latest science" .)