Crossword Genius

Best rebuttal (5)

Ross

I believe the answer is:

worst

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

This clue might be a double definition.

'best' is the first definition.
(I've seen this before)

'rebuttal' is the second definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

Can you help me to learn more?

(Other definitions for worst that I've seen before include "Most severe" , "Strangely, best" , "The least favorable" , "Of the poorest quality" , "Far from the best - defeat" .)

I've seen this clue in the Evening Standard.
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