Smaller, inferior (6)
I believe the answer is:
lesser
I believe this is a double definition.
'smaller' is the first definition.
(I've seen this before)
'inferior' is the second definition.
(I've seen this before)
(Other definitions for lesser that I've seen before include "Smaller, minor" , "Smaller; inferior" , "Not as great" , "Not so important (one)" , "Smaller in size or amount or value" .)