Wit is bachelor's field, that's about correct! (6,5)
I believe the answer is:
bright spark
'wit' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'bachelor's field that's about correct' is the wordplay.
'bachelor's' becomes 'B's' (abbreviation e.g. BA=Bachelor of Arts).
'field' becomes 'park'.
'that's about' is an insertion indicator.
'correct' becomes 'right' (right can mean correct).
'bs'+'park'='bspark'
'bspark' going around 'right' is 'BRIGHT SPARK'.
'is' is the link.
Can you help me to learn more?
(Other definitions for bright spark that I've seen before include "ironically, one that's witty" , "one who has many good ideas" , "Lively and clever individual" , "One full of ideas" , "Clever person" .)