Rated poor company for architectural style (3,4)
I believe the answer is:
art deco
'architectural style' is the definition.
'rated poor company' is the wordplay.
'poor' is an anagram indicator.
'company' becomes 'co' (abbreviation).
'rated' anagrammed gives 'artde'.
'artde'+'co'='ART DECO'
'for' is the link.
(Other definitions for art deco that I've seen before include "style of interior design" , "Style popular in the 1920s and '30s" , "Aesthetic style" , "Nineteen twenty's and thirties style" , "Old style" .)