Be very evident that corporal punishment is not allowed (5,3)
I believe the answer is:
stick out
'be very' is the definition.
'stick out' can be an answer for 'be' (sticking out is a kind of being). I am not sure about the 'very' bit.
'that corporal punishment is not allowed' is the wordplay.
'that corporal punishment' becomes 'stick' (corporal punishment administered with a stick ).
'is not allowed' becomes 'out' (I've seen this before).
'stick'+'out'='STICK OUT'
'evident' acts as a link.
Can you help me to learn more?
(Other definitions for stick out that I've seen before include "Protrude, be prominent" , "Continue to resist" , "Don't give up - project" .)