Smarter type is not wrong in Belgium joining Resistance (8)
I believe the answer is:
brighter
'smarter type is' is the definition.
I can't judge whether this definition defines the answer.
'not wrong in belgium joining resistance' is the wordplay.
'not wrong' becomes 'right' ('right' is the opposite to 'wrong').
'in' is an insertion indicator.
'belgium' becomes 'b' (international vehicle registration code).
'joining resistance' becomes 'er' (I am not sure about this - if you are sure you should believe this answer much more).
'b'+'er'='ber'
'right' placed within 'ber' is 'BRIGHTER'.
Can you help me to learn more?
(Other definitions for brighter that I've seen before include "More sunny" , "More brilliant" , "Emitting more light" , "Sunnier or smarter" , "Shinier or smarter" .)