The maudlin Ms Dean? (6)

I believe the answer is:

nellie

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'the maudlin ms dean?' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

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(Other definitions for nellie that I've seen before include "Old song: ''Wait Till the Sun Shines . . . . . .''" , "'There's an old mill by the stream,......Dean'" , "Elephant in a song" , "Dame -- Melba, singer" , "See 6" .)

I've seen this clue in the Evening Standard.

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