Assume leading role at school: wield the axe! (6)
I believe the answer is:
behead
'wield the axe' is the definition.
(I've seen this before)
'assume leading role at school' is the wordplay.
I cannot quite see how this works, but
'leading' could be 'head' (I've seen this in other clues) and 'head' is present in the answer.
The remaining letters 'be' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for behead that I've seen before include "Remove cranium as in old execution" , "Decapitate" , "Guillotine" , "Knock one's block off!" , "Knock someone's block off?" .)