Not the best group for the teacher to take? (6,5)
I believe the answer is:
second class
'not the best' is the definition.
'group for the teacher to take?' is the wordplay.
I cannot quite understand how this works, but
'group' could be 'class' (class can mean a group of things) and 'class' is located in the answer.
'take?' could be 'con' (I've seen this in another clue) and 'con' is located in the answer.
The remaining letters 'sed' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for second class that I've seen before include "Not the best quality" , "B-rated" , "Of inferior status" , "Slower postal rate" , "Next to best" .)