The Grapes of Wrath (1940)

[Chross]

Dorris Bowdon (26) (?) receives a solid smack from ... well, I don't know really.
None of the female co-stars seems to fit the description.

We'll have to see the scene to find out I guess...

IMDB: https://www.imdb.com/title/tt0032551/

[KHW]

Movie can be viewed or downloaded here https://archive.org/details/the-grapes-of-wrath-1940 - good one smacker one hour and 48 minutes in.