Central lob bamboozled McEnroe again (4,4)

I believe the answer is:

once more

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

'again' is the definition.
(synonyms)

I don't understand the rest of the clue.

(Another definition for once more that I've seen is " Again".)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.