Portrayer of Spade and Marlowe (6)

I believe the answer is:

bogart

(Other definitions for bogart that I've seen before include "American actor" , "Famous player" , "Humphrey --, US film actor" , "Rob gat from the old film star" , "Lauren Bacall's first actor husband, d. 1957" .)

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

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