___ ratio (TV screen metric) (6)
I believe the answer is:
aspect
(Other definitions for aspect that I've seen before include "'Appearance, facet (6)'" , "Manner" , "Prospect, facet" , "View, panorama" , "View, outlook" .)
I believe the answer is:
aspect
(Other definitions for aspect that I've seen before include "'Appearance, facet (6)'" , "Manner" , "Prospect, facet" , "View, panorama" , "View, outlook" .)