Rebuked conspiracy theorist interrupting gent (6,3)

I believe the answer is:

ticked off

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'rebuked' is the definition.
(I've seen this before)

'conspiracy theorist interrupting gent' is the wordplay.
'conspiracy theorist' becomes 'icked' (I am not sure about this - if you are sure you should believe this answer much more).
'interrupting' indicates putting letters inside.
'gent' becomes 'toff' (term for an upper-class person).
'icked' inserted inside 'toff' is 'TICKED OFF'.

Can you help me to learn more?

(Other definitions for ticked off that I've seen before include "marked completed items?" , "Scolded" , "roasted" , "removed from list" , "Rebuked" .)

I've seen this clue in The Guardian.

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