Is it played in loud disagreement? (4)

I believe the answer is:

ludo

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'disagreement?' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'is it played in loud' is the wordplay.
'loud' can be anagrammed to 'LUDO'.
Though, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for ludo that I've seen before include "race for four tokens" , "Traditional board game" , "Children's board game" , "Loud sort of board game with dice and counters" , "Race game" .)

I've seen this clue in the Evening Standard.

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