Whom Ingmar Bergman adapted for the play Nora (5)

I believe the answer is:

ibsen

(Other definitions for ibsen that I've seen before include "6 24 113 [SCAN-DIN-AVIAN] writer" , "Norse playwright" , "Linesman" , "Scandinavian playwright" , "'Ghosts' writer" .)

I've seen this clue in the Newsday.

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