"May December” star Julianne (5)

I believe the answer is:

moore

(Other definitions for moore that I've seen before include "George . . ., Irish writer of 'Esther Waters' etc." , "Patrick --, astronomer" , "Henry -, twentieth century English sculptor" , "Footballer" , "Old Irish melody-maker" .)

I've seen this clue in The Wall Street Journal.

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