More intelligent bishop to correct queen (8)

I believe the answer is:

brighter

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'more intelligent' is the definition.
Both the definition and answer are comparative adjectives. Maybe they are linked in a way I don't understand?

'bishop to correct queen' is the wordplay.
'bishop' becomes 'B' (abbreviation for bishop in chess).
'to correct' becomes 'right' (right can mean correct).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'b'+'right'+'er'='BRIGHTER'

Can you help me to learn more?

(Other definitions for brighter that I've seen before include "Sunnier or smarter" , "More sunny" , "More brilliant" , "Shinier or smarter" , "Emitting more light" .)

I've seen this clue in the Sydney Morning Herald.

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