Mediator clear on study dominated by ministers (6-6)
I believe the answer is:
priest-ridden
'dominated by ministers' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives sometimes mean the same thing.
'mediator clear on study' is the wordplay.
I cannot quite see how this works, but
'clear' could be 'rid' (synonyms) and 'rid' is found within the answer.
'study' could be 'den' (term for a study or office) and 'den' is found in the answer.
The remaining letters 'priest' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?