One in the biology class is very bright (6)
I believe the answer is:
genius
'very bright' is the definition.
I can't judge whether this defines the answer.
'one in the biology class' is the wordplay.
'one' becomes 'i' (Roman numeral).
'in the' is an insertion indicator.
'biology class' becomes 'genus' (I've seen this in another clue).
'i' placed into 'genus' is 'GENIUS'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for genius that I've seen before include "great idea?" , "Great mind" , "Prodigy" , "faculty" , "Outstanding intellectual capability" .)