Do wrong in bringing up students (4,2)
I believe the answer is:
slip up
'do wrong' is the definition.
Although both the answer and definition are verbs in their base form, I don't understand how one could define the other.
'bringing up students' is the wordplay.
'bringing up' is a reversal indicator (I've seen 'brought up' mean this (in a down clue, letters go up)).
'students' becomes 'pupils' ('pupil' can be a synonym of 'student').
'pupils' back-to-front is 'SLIP-UP'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for slip up that I've seen before include "Bloomer" , "Small error" , "Make a mistake, being unsteady on feet?" , "Informally, make a mistake - lose footing?" , "Make an error" .)