Madison's successor (6)

I believe the answer is:

monroe

'madison's successor' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for monroe that I've seen before include "Marilyn --, US actress" , "Marilyn ___ , film icon" , "5th US president, James" , "Marilyn . . . . . ., tragic Hollywood icon" , "FILMSTAR" .)

I've seen this clue in the King Feature Syndicate.

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