Process of setter having tea with revolting wrong man (9)
I believe the answer is:
mechanism
'process' is the definition.
(mechanism is a kind of process)
'setter having tea with revolting wrong man' is the wordplay.
I cannot quite see how this works, but
'setter' could be 'me' (the setter of the clue) and 'me' is present in the answer.
'tea' could be 'cha' (cha is a type of tea) and 'cha' is present in the answer.
'man' could be 'n' (knight, a man in chess) and 'n' is found within the answer.
The remaining letters 'ism' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Other definitions for mechanism that I've seen before include "Device with moving parts that performs some function" , "Process" , "Workings" , "Way in which something works" .)