A lout's name? (3)

I believe the answer is:

lou

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This clue could be a double definition.

'a lout's' is the first definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?

'name?' is the second definition.

Can you help me to learn more?

(Other definitions for lou that I've seen before include "-- Reed, singer" , "--- Costello, US comic" , "man" , "-- Costello, Abbott's partner" , "-- Reed, rock musician" .)

I've seen this clue in the Evening Standard.

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