Bing —, Best Actor in a Leading Role Oscar nominee for The Country Girl (6)
I believe the answer is:
crosby
(Other definitions for crosby that I've seen before include "Bing . . . . . ., king of the crooners" , "Merseyside town - White Christmas singer, d. 1977" , "Bing --, US singer" , "Bing -, US crooner" , "singer and actor" .)