Crossword Genius

Impeach Don, ineffectively defended (10)

Ross

I believe the answer is:

championed

I'm a little stuck... Click here to teach me more about this clue!

'defended' is the definition.
('champion' can be a synonym of 'defend')

'impeach don ineffectively' is the wordplay.
'impeach don' can be anagrammed to 'CHAMPIONED'.
Though, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Another definition for championed that I've seen is " Was supportive".)

I've seen this clue in The Everyman puzzle in The Observer.
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