Charge leaders of teachers organisation planning unauthorised protest (3,2)
I believe the answer is:
top up
'charge' is the definition.
Both the answer and definition are verbs in their base form.
Perhaps you can see a link between them that I can't see?
'leaders of teachers organisation planning unauthorised protest' is the wordplay.
'leaders of' says to take the initial letters.
The initial letters of 'teachers organisation planning unauthorised protest' is 'TOP-UP'.
Can you help me to learn more?
(Other definitions for top up that I've seen before include "Provide a little more drink" , "Replenish" , "Amount required to restore something's level" , "Add a little reason" , "Supply a little to fill" .)