Decides dirt being dished should be denigrated (11)
I believe the answer is:
discredited
'denigrated' is the definition.
The definition and answer can be both to do with communicating as well as being past participle verbs.
Perhaps there's an association between them I don't understand?
'decides dirt being dished should' is the wordplay.
'decides dirt' can be anagrammed to 'DISCREDITED'.
But, I'm not sure how the anagram is indicated.
'be' acts as a link.
Can you help me to learn more?
(Other definitions for discredited that I've seen before include "Shown to be false" , "One treating dirty garments" .)