Official report advances conspiracy theory, angering leaders (4)

I believe the answer is:

acta

I'm a little stuck... Click here to teach me more about this clue!

'official report' is the definition.
'acta' can be an answer for 'report' (thesaurus). I'm not certain of the 'official' bit.

'advances conspiracy theory angering leaders' is the wordplay.
'leaders' says to take the initial letters.
The initial letters of 'advances conspiracy theory angering' is 'ACTA'.

Can you help me to learn more?

(Other definitions for acta that I've seen before include "minutes of official proceedings" , "records" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.