Being brighter is less confused (7)
I believe the answer is:
clearer
'less confused' is the definition.
(I've seen this in another clue)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for clearer that I've seen before include "Less obscured" , "More intelligible, less cloudy" , "Less cloudy or more easily understood" , "More plain" , "Less clouded, more well-defined" .)