Intelligent, informally (6)
I believe the answer is:
brainy
(Other definitions for brainy that I've seen before include "Clever, got lots of grey matter" , "Intelligent, clever." , "Bright" , "Highly intelligent" , "smart?" .)
I believe the answer is:
brainy
(Other definitions for brainy that I've seen before include "Clever, got lots of grey matter" , "Intelligent, clever." , "Bright" , "Highly intelligent" , "smart?" .)