Obstinate but brainy? (10)
I believe the answer is:
headstrong
This clue could be a double definition.
'obstinate' is the first definition.
(I've seen this before)
'brainy?' is the second definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'but' acts as a link.
Can you help me to learn more?
(Other definitions for headstrong that I've seen before include "obstinately self-willed" , "Wilfully determined" , "Obstinate" , "strong-willed" , "Obstinately rash" .)