Crossword Genius

The rotter upset tea on a cleric! (6)


I believe the answer is:


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Here is my best explanation:

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

'the rotter upset tea' is the wordplay.
'the rotter' becomes 'cur' (I can't explain this - if you can you should believe this answer much more).
'upset' indicates an anagram.
'tea' anagrammed gives 'ate'.

'on' is the link.

Can you help me to learn more?

This clue was last seen in Evening Standard