Overturn function of multinational organization (4)
I believe the answer is:
undo
'overturn' is the definition.
(I've seen this before)
'function of multinational organization' is the wordplay.
I cannot quite see how this works, but
'function' could be 'do' (both can mean an event) and 'do' is found in the answer.
'organization' could be 'un' (UN is an example) and 'un' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for undo that I've seen before include "Cause downfall" , "Unfasten or annul" , "Cancel or reverse an action" , "Overturn" , "Open, a knot say" .)