Bishop, correct and smart (6)
I believe the answer is:
bright
'smart' is the definition.
(I know that smart can be written as bright)
'bishop correct' is the wordplay.
'bishop' becomes 'B' (abbreviation for bishop in chess).
'correct' becomes 'right' (right can mean correct).
'b'+'right'='BRIGHT'
'and' is the link.
(Other definitions for bright that I've seen before include "Illuminated" , "Effulgent" , "Jolly" , "Clever; vivid" , "Clear" .)